/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:31:44,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:31:44,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:31:44,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:31:44,917 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 00:31:44,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:31:44,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:31:44,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:31:44,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:31:44,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:31:44,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:31:44,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:31:44,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:31:44,947 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:31:44,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:31:44,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:31:44,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:31:44,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:31:44,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:31:44,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:31:44,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:31:44,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:31:44,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:31:44,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:31:44,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:31:44,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:31:44,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:31:44,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:31:44,950 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:31:44,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:31:44,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:31:45,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:31:45,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:31:45,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:31:45,140 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:31:45,145 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:31:45,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2022-02-11 00:31:45,146 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2022-02-11 00:31:45,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:31:45,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:31:45,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:31:45,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:31:45,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:31:45,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,210 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:31:45,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:31:45,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:31:45,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:31:45,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:31:45,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:31:45,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:31:45,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:31:45,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:31:45,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/1) ... [2022-02-11 00:31:45,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:31:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:45,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-11 00:31:45,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-11 00:31:45,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:31:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:31:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:31:45,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:31:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:31:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:31:45,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:31:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:31:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:31:45,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-11 00:31:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-11 00:31:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-11 00:31:45,317 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:31:45,357 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:31:45,358 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:31:45,532 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:31:45,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:31:45,635 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-11 00:31:45,636 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:31:45 BoogieIcfgContainer [2022-02-11 00:31:45,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:31:45,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:31:45,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:31:45,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:31:45,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:31:45" (1/2) ... [2022-02-11 00:31:45,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202f95a8 and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:31:45, skipping insertion in model container [2022-02-11 00:31:45,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:31:45" (2/2) ... [2022-02-11 00:31:45,644 INFO L112 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2022-02-11 00:31:45,648 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:31:45,649 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:31:45,649 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:31:45,649 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:31:45,718 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-11 00:31:45,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:31:45,755 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 00:31:45,755 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-11 00:31:45,761 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2022-02-11 00:31:45,783 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:31:45,791 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:45,791 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:45,792 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash -29429742, now seen corresponding path program 1 times [2022-02-11 00:31:45,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:45,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912828859] [2022-02-11 00:31:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:45,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:46,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:46,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912828859] [2022-02-11 00:31:46,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912828859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:46,085 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:46,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:46,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906145712] [2022-02-11 00:31:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:46,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:46,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:46,143 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:46,353 INFO L93 Difference]: Finished difference Result 362 states and 1164 transitions. [2022-02-11 00:31:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:31:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:31:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:46,369 INFO L225 Difference]: With dead ends: 362 [2022-02-11 00:31:46,370 INFO L226 Difference]: Without dead ends: 347 [2022-02-11 00:31:46,380 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:31:46,383 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:46,384 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-11 00:31:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 126. [2022-02-11 00:31:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2022-02-11 00:31:46,428 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2022-02-11 00:31:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:46,429 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2022-02-11 00:31:46,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2022-02-11 00:31:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:31:46,430 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:46,430 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:46,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:31:46,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1669447950, now seen corresponding path program 2 times [2022-02-11 00:31:46,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:46,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221984541] [2022-02-11 00:31:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:46,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:46,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:46,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221984541] [2022-02-11 00:31:46,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221984541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:46,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:46,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:46,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919965806] [2022-02-11 00:31:46,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:46,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:46,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:46,566 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:46,727 INFO L93 Difference]: Finished difference Result 285 states and 894 transitions. [2022-02-11 00:31:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:31:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:31:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:46,730 INFO L225 Difference]: With dead ends: 285 [2022-02-11 00:31:46,730 INFO L226 Difference]: Without dead ends: 270 [2022-02-11 00:31:46,730 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:31:46,731 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:46,732 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-11 00:31:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 132. [2022-02-11 00:31:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2022-02-11 00:31:46,743 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2022-02-11 00:31:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:46,743 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2022-02-11 00:31:46,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2022-02-11 00:31:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:31:46,747 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:46,747 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:46,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 00:31:46,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 332003462, now seen corresponding path program 3 times [2022-02-11 00:31:46,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:46,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006116159] [2022-02-11 00:31:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:46,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:46,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:46,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006116159] [2022-02-11 00:31:46,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006116159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:46,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:46,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:46,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959743328] [2022-02-11 00:31:46,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:46,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:46,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:46,947 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:47,201 INFO L93 Difference]: Finished difference Result 270 states and 805 transitions. [2022-02-11 00:31:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:31:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:31:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:47,203 INFO L225 Difference]: With dead ends: 270 [2022-02-11 00:31:47,203 INFO L226 Difference]: Without dead ends: 255 [2022-02-11 00:31:47,203 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:31:47,204 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:47,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-11 00:31:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 140. [2022-02-11 00:31:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-02-11 00:31:47,212 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-02-11 00:31:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:47,212 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-02-11 00:31:47,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-02-11 00:31:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:31:47,213 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:47,213 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:47,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:31:47,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash -198832182, now seen corresponding path program 4 times [2022-02-11 00:31:47,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:47,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083317319] [2022-02-11 00:31:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:47,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:47,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:47,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083317319] [2022-02-11 00:31:47,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083317319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:47,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:47,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:47,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054502433] [2022-02-11 00:31:47,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:47,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:47,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:47,341 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:47,598 INFO L93 Difference]: Finished difference Result 263 states and 775 transitions. [2022-02-11 00:31:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:31:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:31:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:47,600 INFO L225 Difference]: With dead ends: 263 [2022-02-11 00:31:47,600 INFO L226 Difference]: Without dead ends: 248 [2022-02-11 00:31:47,600 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:31:47,601 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:47,602 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-11 00:31:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2022-02-11 00:31:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-02-11 00:31:47,617 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-02-11 00:31:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:47,617 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-02-11 00:31:47,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-02-11 00:31:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:31:47,618 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:47,619 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:47,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-11 00:31:47,619 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:47,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1457604362, now seen corresponding path program 5 times [2022-02-11 00:31:47,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:47,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915438859] [2022-02-11 00:31:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:47,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:47,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:47,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915438859] [2022-02-11 00:31:47,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915438859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:47,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:47,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:47,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530608419] [2022-02-11 00:31:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:47,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:47,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:47,747 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:47,948 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2022-02-11 00:31:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:31:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:31:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:47,950 INFO L225 Difference]: With dead ends: 229 [2022-02-11 00:31:47,950 INFO L226 Difference]: Without dead ends: 214 [2022-02-11 00:31:47,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:31:47,951 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:47,951 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 31 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-11 00:31:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2022-02-11 00:31:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-02-11 00:31:47,958 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-02-11 00:31:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:47,958 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-02-11 00:31:47,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-02-11 00:31:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-11 00:31:47,959 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:47,959 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:47,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-11 00:31:47,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1842890102, now seen corresponding path program 6 times [2022-02-11 00:31:47,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:47,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135484637] [2022-02-11 00:31:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:47,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:48,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135484637] [2022-02-11 00:31:48,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135484637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:48,045 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:48,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:48,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668413186] [2022-02-11 00:31:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:48,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:48,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:48,047 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,338 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2022-02-11 00:31:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:31:48,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-11 00:31:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,340 INFO L225 Difference]: With dead ends: 336 [2022-02-11 00:31:48,340 INFO L226 Difference]: Without dead ends: 321 [2022-02-11 00:31:48,340 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:31:48,341 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,341 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:31:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-11 00:31:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2022-02-11 00:31:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-02-11 00:31:48,348 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-02-11 00:31:48,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,348 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-02-11 00:31:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-02-11 00:31:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:31:48,349 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,349 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-11 00:31:48,349 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1236732740, now seen corresponding path program 1 times [2022-02-11 00:31:48,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:48,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183538839] [2022-02-11 00:31:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:48,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183538839] [2022-02-11 00:31:48,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183538839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:48,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:48,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:31:48,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311469700] [2022-02-11 00:31:48,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:31:48,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:31:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:31:48,366 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,387 INFO L93 Difference]: Finished difference Result 163 states and 538 transitions. [2022-02-11 00:31:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:31:48,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:31:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,389 INFO L225 Difference]: With dead ends: 163 [2022-02-11 00:31:48,389 INFO L226 Difference]: Without dead ends: 163 [2022-02-11 00:31:48,389 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:31:48,390 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,390 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-11 00:31:48,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-02-11 00:31:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.3209876543209877) internal successors, (538), 162 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 538 transitions. [2022-02-11 00:31:48,411 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 538 transitions. Word has length 15 [2022-02-11 00:31:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,411 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 538 transitions. [2022-02-11 00:31:48,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 538 transitions. [2022-02-11 00:31:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:31:48,412 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,412 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-11 00:31:48,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1228810757, now seen corresponding path program 1 times [2022-02-11 00:31:48,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:48,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244626820] [2022-02-11 00:31:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:48,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244626820] [2022-02-11 00:31:48,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244626820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:48,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:48,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:31:48,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035510217] [2022-02-11 00:31:48,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:31:48,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:31:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:31:48,426 INFO L87 Difference]: Start difference. First operand 163 states and 538 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,453 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2022-02-11 00:31:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:31:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:31:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,455 INFO L225 Difference]: With dead ends: 192 [2022-02-11 00:31:48,455 INFO L226 Difference]: Without dead ends: 192 [2022-02-11 00:31:48,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:31:48,455 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,456 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-11 00:31:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-02-11 00:31:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2022-02-11 00:31:48,460 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2022-02-11 00:31:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,460 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2022-02-11 00:31:48,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2022-02-11 00:31:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 00:31:48,461 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,461 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-11 00:31:48,461 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:48,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1075245774, now seen corresponding path program 1 times [2022-02-11 00:31:48,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:48,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27110870] [2022-02-11 00:31:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:48,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27110870] [2022-02-11 00:31:48,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27110870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:48,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:48,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 00:31:48,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916726161] [2022-02-11 00:31:48,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 00:31:48,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 00:31:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:31:48,490 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,508 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2022-02-11 00:31:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 00:31:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-11 00:31:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,510 INFO L225 Difference]: With dead ends: 223 [2022-02-11 00:31:48,510 INFO L226 Difference]: Without dead ends: 223 [2022-02-11 00:31:48,510 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 00:31:48,511 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,511 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-11 00:31:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-02-11 00:31:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2022-02-11 00:31:48,516 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2022-02-11 00:31:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,516 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2022-02-11 00:31:48,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2022-02-11 00:31:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:48,517 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,524 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-11 00:31:48,524 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:48,525 INFO L85 PathProgramCache]: Analyzing trace with hash -8420014, now seen corresponding path program 1 times [2022-02-11 00:31:48,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:48,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881337442] [2022-02-11 00:31:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:48,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881337442] [2022-02-11 00:31:48,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881337442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:48,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:48,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:48,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123441010] [2022-02-11 00:31:48,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:48,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:48,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:48,576 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,652 INFO L93 Difference]: Finished difference Result 571 states and 1745 transitions. [2022-02-11 00:31:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:31:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,654 INFO L225 Difference]: With dead ends: 571 [2022-02-11 00:31:48,654 INFO L226 Difference]: Without dead ends: 495 [2022-02-11 00:31:48,655 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:31:48,655 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,656 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 28 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-11 00:31:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2022-02-11 00:31:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2672413793103448) internal successors, (758), 232 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 758 transitions. [2022-02-11 00:31:48,663 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 758 transitions. Word has length 16 [2022-02-11 00:31:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,664 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 758 transitions. [2022-02-11 00:31:48,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 758 transitions. [2022-02-11 00:31:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:48,665 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,665 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-11 00:31:48,666 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 245083442, now seen corresponding path program 1 times [2022-02-11 00:31:48,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:48,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893691560] [2022-02-11 00:31:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:48,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893691560] [2022-02-11 00:31:48,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893691560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:48,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:48,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:48,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685142254] [2022-02-11 00:31:48,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:48,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:48,705 INFO L87 Difference]: Start difference. First operand 233 states and 758 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,759 INFO L93 Difference]: Finished difference Result 403 states and 1190 transitions. [2022-02-11 00:31:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:31:48,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:48,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,761 INFO L225 Difference]: With dead ends: 403 [2022-02-11 00:31:48,761 INFO L226 Difference]: Without dead ends: 355 [2022-02-11 00:31:48,761 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:31:48,762 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,762 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-11 00:31:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 233. [2022-02-11 00:31:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2022-02-11 00:31:48,768 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2022-02-11 00:31:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,768 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2022-02-11 00:31:48,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2022-02-11 00:31:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:48,769 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,769 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-11 00:31:48,769 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1080130578, now seen corresponding path program 2 times [2022-02-11 00:31:48,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:48,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241677254] [2022-02-11 00:31:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:48,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241677254] [2022-02-11 00:31:48,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241677254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:48,806 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:48,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:48,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278410223] [2022-02-11 00:31:48,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:48,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:48,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:48,806 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:48,889 INFO L93 Difference]: Finished difference Result 500 states and 1476 transitions. [2022-02-11 00:31:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:31:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:48,892 INFO L225 Difference]: With dead ends: 500 [2022-02-11 00:31:48,892 INFO L226 Difference]: Without dead ends: 460 [2022-02-11 00:31:48,892 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:31:48,892 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:48,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-02-11 00:31:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 226. [2022-02-11 00:31:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.2844444444444445) internal successors, (739), 225 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 739 transitions. [2022-02-11 00:31:48,899 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 739 transitions. Word has length 16 [2022-02-11 00:31:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:48,899 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 739 transitions. [2022-02-11 00:31:48,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 739 transitions. [2022-02-11 00:31:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:48,899 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:48,900 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:48,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-11 00:31:48,900 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 94528582, now seen corresponding path program 1 times [2022-02-11 00:31:48,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:48,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645698726] [2022-02-11 00:31:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:48,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:48,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645698726] [2022-02-11 00:31:48,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645698726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:48,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857545016] [2022-02-11 00:31:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:48,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:48,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:48,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:31:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-11 00:31:48,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:49,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:49,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857545016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:49,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:49,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-02-11 00:31:49,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067222864] [2022-02-11 00:31:49,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:49,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-11 00:31:49,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-11 00:31:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:31:49,268 INFO L87 Difference]: Start difference. First operand 226 states and 739 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:49,404 INFO L93 Difference]: Finished difference Result 535 states and 1546 transitions. [2022-02-11 00:31:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:31:49,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:49,407 INFO L225 Difference]: With dead ends: 535 [2022-02-11 00:31:49,407 INFO L226 Difference]: Without dead ends: 471 [2022-02-11 00:31:49,407 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-02-11 00:31:49,407 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:49,407 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 69 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-02-11 00:31:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 240. [2022-02-11 00:31:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1841004184100417) internal successors, (761), 239 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 761 transitions. [2022-02-11 00:31:49,414 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 761 transitions. Word has length 16 [2022-02-11 00:31:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:49,414 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 761 transitions. [2022-02-11 00:31:49,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 761 transitions. [2022-02-11 00:31:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:49,415 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:49,415 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:49,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-11 00:31:49,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-11 00:31:49,633 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -757483642, now seen corresponding path program 2 times [2022-02-11 00:31:49,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:49,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104747097] [2022-02-11 00:31:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:49,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:49,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:49,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104747097] [2022-02-11 00:31:49,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104747097] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:49,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:49,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:49,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849913948] [2022-02-11 00:31:49,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:49,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:49,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:49,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:49,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:49,677 INFO L87 Difference]: Start difference. First operand 240 states and 761 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:49,775 INFO L93 Difference]: Finished difference Result 461 states and 1294 transitions. [2022-02-11 00:31:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:31:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:49,777 INFO L225 Difference]: With dead ends: 461 [2022-02-11 00:31:49,777 INFO L226 Difference]: Without dead ends: 434 [2022-02-11 00:31:49,777 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:31:49,778 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:49,778 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:31:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-11 00:31:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 240. [2022-02-11 00:31:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1757322175732217) internal successors, (759), 239 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 759 transitions. [2022-02-11 00:31:49,785 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 759 transitions. Word has length 16 [2022-02-11 00:31:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:49,785 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 759 transitions. [2022-02-11 00:31:49,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 759 transitions. [2022-02-11 00:31:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:49,785 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:49,785 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:49,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-11 00:31:49,786 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:49,786 INFO L85 PathProgramCache]: Analyzing trace with hash -472042042, now seen corresponding path program 2 times [2022-02-11 00:31:49,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:49,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318596574] [2022-02-11 00:31:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:49,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:49,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:49,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318596574] [2022-02-11 00:31:49,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318596574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:49,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:49,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:49,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615483300] [2022-02-11 00:31:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:49,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:49,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:49,819 INFO L87 Difference]: Start difference. First operand 240 states and 759 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:49,867 INFO L93 Difference]: Finished difference Result 398 states and 1140 transitions. [2022-02-11 00:31:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:31:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:49,869 INFO L225 Difference]: With dead ends: 398 [2022-02-11 00:31:49,869 INFO L226 Difference]: Without dead ends: 361 [2022-02-11 00:31:49,870 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:31:49,870 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:49,870 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-11 00:31:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 240. [2022-02-11 00:31:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1673640167364017) internal successors, (757), 239 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 757 transitions. [2022-02-11 00:31:49,877 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 757 transitions. Word has length 16 [2022-02-11 00:31:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:49,877 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 757 transitions. [2022-02-11 00:31:49,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 757 transitions. [2022-02-11 00:31:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:49,877 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:49,877 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:49,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-11 00:31:49,878 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1777677254, now seen corresponding path program 3 times [2022-02-11 00:31:49,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:49,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609762055] [2022-02-11 00:31:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:49,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:49,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609762055] [2022-02-11 00:31:49,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609762055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:49,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:49,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:31:49,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648676347] [2022-02-11 00:31:49,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:31:49,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:31:49,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:31:49,910 INFO L87 Difference]: Start difference. First operand 240 states and 757 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:49,946 INFO L93 Difference]: Finished difference Result 343 states and 1007 transitions. [2022-02-11 00:31:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:31:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:49,947 INFO L225 Difference]: With dead ends: 343 [2022-02-11 00:31:49,947 INFO L226 Difference]: Without dead ends: 271 [2022-02-11 00:31:49,947 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:31:49,948 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:49,948 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-11 00:31:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 240. [2022-02-11 00:31:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1338912133891212) internal successors, (749), 239 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 749 transitions. [2022-02-11 00:31:49,953 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 749 transitions. Word has length 16 [2022-02-11 00:31:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:49,953 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 749 transitions. [2022-02-11 00:31:49,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 749 transitions. [2022-02-11 00:31:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:49,955 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:49,955 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:49,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-11 00:31:49,955 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1203369498, now seen corresponding path program 3 times [2022-02-11 00:31:49,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:49,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600431381] [2022-02-11 00:31:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:49,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:49,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600431381] [2022-02-11 00:31:49,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600431381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:49,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:49,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:31:49,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298485966] [2022-02-11 00:31:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:49,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:31:49,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:31:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:31:49,992 INFO L87 Difference]: Start difference. First operand 240 states and 749 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:50,028 INFO L93 Difference]: Finished difference Result 301 states and 906 transitions. [2022-02-11 00:31:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:31:50,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:50,029 INFO L225 Difference]: With dead ends: 301 [2022-02-11 00:31:50,029 INFO L226 Difference]: Without dead ends: 229 [2022-02-11 00:31:50,030 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:50,030 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:50,030 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-11 00:31:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 219. [2022-02-11 00:31:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.036697247706422) internal successors, (662), 218 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 662 transitions. [2022-02-11 00:31:50,035 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 662 transitions. Word has length 16 [2022-02-11 00:31:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:50,035 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 662 transitions. [2022-02-11 00:31:50,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 662 transitions. [2022-02-11 00:31:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:50,036 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:50,036 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:50,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-11 00:31:50,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash 664668842, now seen corresponding path program 4 times [2022-02-11 00:31:50,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:50,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080445703] [2022-02-11 00:31:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:50,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:50,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:50,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080445703] [2022-02-11 00:31:50,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080445703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:50,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:50,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:31:50,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121122036] [2022-02-11 00:31:50,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:50,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 00:31:50,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 00:31:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:31:50,059 INFO L87 Difference]: Start difference. First operand 219 states and 662 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:50,092 INFO L93 Difference]: Finished difference Result 272 states and 791 transitions. [2022-02-11 00:31:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 00:31:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:50,093 INFO L225 Difference]: With dead ends: 272 [2022-02-11 00:31:50,093 INFO L226 Difference]: Without dead ends: 209 [2022-02-11 00:31:50,093 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 00:31:50,094 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:50,094 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-11 00:31:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-02-11 00:31:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2022-02-11 00:31:50,098 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2022-02-11 00:31:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:50,098 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2022-02-11 00:31:50,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2022-02-11 00:31:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-11 00:31:50,098 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:50,098 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:50,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-11 00:31:50,099 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash 402212618, now seen corresponding path program 3 times [2022-02-11 00:31:50,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:50,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749345267] [2022-02-11 00:31:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:50,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:50,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749345267] [2022-02-11 00:31:50,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749345267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:31:50,126 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:31:50,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-11 00:31:50,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436717519] [2022-02-11 00:31:50,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:31:50,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:31:50,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:31:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:31:50,127 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:50,176 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2022-02-11 00:31:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:31:50,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-11 00:31:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:50,177 INFO L225 Difference]: With dead ends: 238 [2022-02-11 00:31:50,177 INFO L226 Difference]: Without dead ends: 189 [2022-02-11 00:31:50,177 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:31:50,178 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:50,178 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 00:31:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-11 00:31:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-11 00:31:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-02-11 00:31:50,181 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2022-02-11 00:31:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:50,181 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-02-11 00:31:50,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-02-11 00:31:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:31:50,182 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:50,182 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:50,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-11 00:31:50,182 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1843106918, now seen corresponding path program 1 times [2022-02-11 00:31:50,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:50,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550471785] [2022-02-11 00:31:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:50,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:50,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550471785] [2022-02-11 00:31:50,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550471785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:50,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438126791] [2022-02-11 00:31:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:50,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:50,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:50,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:50,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:31:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:50,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:31:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:50,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 214 [2022-02-11 00:31:50,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 218 [2022-02-11 00:31:50,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 152 [2022-02-11 00:31:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:51,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:51,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 214 [2022-02-11 00:31:52,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:52,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-02-11 00:31:52,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-02-11 00:31:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:31:52,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438126791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:52,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:52,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-11 00:31:52,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852450711] [2022-02-11 00:31:52,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:31:52,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:31:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:31:52,293 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:54,324 INFO L93 Difference]: Finished difference Result 756 states and 2092 transitions. [2022-02-11 00:31:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:31:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:31:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:54,327 INFO L225 Difference]: With dead ends: 756 [2022-02-11 00:31:54,327 INFO L226 Difference]: Without dead ends: 606 [2022-02-11 00:31:54,328 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:31:54,328 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 266 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:54,328 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 249 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:31:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-02-11 00:31:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 236. [2022-02-11 00:31:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.157446808510638) internal successors, (742), 235 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 742 transitions. [2022-02-11 00:31:54,335 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 742 transitions. Word has length 20 [2022-02-11 00:31:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:54,335 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 742 transitions. [2022-02-11 00:31:54,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 742 transitions. [2022-02-11 00:31:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:31:54,336 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:54,336 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:54,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:54,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-02-11 00:31:54,552 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1866509036, now seen corresponding path program 2 times [2022-02-11 00:31:54,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:54,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207023893] [2022-02-11 00:31:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:54,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:54,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207023893] [2022-02-11 00:31:54,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207023893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:54,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797670178] [2022-02-11 00:31:54,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:31:54,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:54,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:54,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:31:54,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:31:54,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:54,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:31:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:54,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 182 [2022-02-11 00:31:55,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:31:55,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 124 [2022-02-11 00:31:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:55,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:55,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 223 [2022-02-11 00:31:56,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:56,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-02-11 00:31:56,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-02-11 00:31:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:56,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797670178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:56,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:56,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-02-11 00:31:56,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659234705] [2022-02-11 00:31:56,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:56,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:31:56,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:31:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:31:56,264 INFO L87 Difference]: Start difference. First operand 236 states and 742 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:31:57,258 INFO L93 Difference]: Finished difference Result 574 states and 1650 transitions. [2022-02-11 00:31:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:31:57,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:31:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:31:57,260 INFO L225 Difference]: With dead ends: 574 [2022-02-11 00:31:57,260 INFO L226 Difference]: Without dead ends: 490 [2022-02-11 00:31:57,260 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:31:57,260 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:31:57,261 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 274 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:31:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-02-11 00:31:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 274. [2022-02-11 00:31:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.10989010989011) internal successors, (849), 273 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 849 transitions. [2022-02-11 00:31:57,267 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 849 transitions. Word has length 20 [2022-02-11 00:31:57,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:31:57,267 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 849 transitions. [2022-02-11 00:31:57,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:31:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 849 transitions. [2022-02-11 00:31:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:31:57,268 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:31:57,268 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:31:57,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:31:57,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:57,484 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:31:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:31:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash -820679224, now seen corresponding path program 3 times [2022-02-11 00:31:57,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:31:57,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263743780] [2022-02-11 00:31:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:31:57,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:31:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:31:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:57,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:31:57,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263743780] [2022-02-11 00:31:57,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263743780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:31:57,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543540497] [2022-02-11 00:31:57,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:31:57,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:31:57,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:31:57,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:31:57,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:31:57,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:31:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:31:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:31:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:31:57,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:31:58,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 197 [2022-02-11 00:31:58,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 157 [2022-02-11 00:31:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:58,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:31:58,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 214 [2022-02-11 00:31:58,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:31:58,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-02-11 00:31:58,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-02-11 00:31:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:31:59,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543540497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:31:59,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:31:59,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-02-11 00:31:59,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666208925] [2022-02-11 00:31:59,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:31:59,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:31:59,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:31:59,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:31:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:31:59,211 INFO L87 Difference]: Start difference. First operand 274 states and 849 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:00,366 INFO L93 Difference]: Finished difference Result 582 states and 1687 transitions. [2022-02-11 00:32:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:32:00,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:00,368 INFO L225 Difference]: With dead ends: 582 [2022-02-11 00:32:00,368 INFO L226 Difference]: Without dead ends: 535 [2022-02-11 00:32:00,369 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:32:00,370 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 176 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:00,370 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 232 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:32:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-11 00:32:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 272. [2022-02-11 00:32:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.081180811808118) internal successors, (835), 271 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 835 transitions. [2022-02-11 00:32:00,377 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 835 transitions. Word has length 20 [2022-02-11 00:32:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:00,377 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 835 transitions. [2022-02-11 00:32:00,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 835 transitions. [2022-02-11 00:32:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:00,379 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:00,379 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:00,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:00,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:00,596 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1053139844, now seen corresponding path program 4 times [2022-02-11 00:32:00,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:00,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482132425] [2022-02-11 00:32:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:00,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:00,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:00,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482132425] [2022-02-11 00:32:00,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482132425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:00,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381312316] [2022-02-11 00:32:00,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:00,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:00,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:00,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:00,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:32:00,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:00,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:01,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 238 [2022-02-11 00:32:01,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:32:01,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:32:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:01,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:01,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-02-11 00:32:02,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-02-11 00:32:02,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:02,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 163 [2022-02-11 00:32:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:02,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381312316] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:02,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:02,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-02-11 00:32:02,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482478638] [2022-02-11 00:32:02,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:02,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:32:02,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:32:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:32:02,249 INFO L87 Difference]: Start difference. First operand 272 states and 835 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:03,845 INFO L93 Difference]: Finished difference Result 774 states and 2234 transitions. [2022-02-11 00:32:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:32:03,845 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:03,848 INFO L225 Difference]: With dead ends: 774 [2022-02-11 00:32:03,848 INFO L226 Difference]: Without dead ends: 687 [2022-02-11 00:32:03,848 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=446, Invalid=1810, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:32:03,849 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 173 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:03,849 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 378 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:32:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-02-11 00:32:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 312. [2022-02-11 00:32:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0192926045016075) internal successors, (939), 311 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 939 transitions. [2022-02-11 00:32:03,856 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 939 transitions. Word has length 20 [2022-02-11 00:32:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:03,856 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 939 transitions. [2022-02-11 00:32:03,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 939 transitions. [2022-02-11 00:32:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:03,856 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:03,857 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:03,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-11 00:32:04,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-11 00:32:04,073 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1025069888, now seen corresponding path program 5 times [2022-02-11 00:32:04,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:04,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356158104] [2022-02-11 00:32:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:04,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:04,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356158104] [2022-02-11 00:32:04,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356158104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:04,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054130961] [2022-02-11 00:32:04,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:04,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:04,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:04,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:04,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:32:04,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:32:04,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:04,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:04,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:04,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 146 [2022-02-11 00:32:04,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-02-11 00:32:04,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-02-11 00:32:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:04,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:05,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:32:05,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:05,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 289 [2022-02-11 00:32:05,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 223 [2022-02-11 00:32:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:05,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054130961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:05,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:05,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-11 00:32:05,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163428161] [2022-02-11 00:32:05,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:05,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:32:05,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:32:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:05,720 INFO L87 Difference]: Start difference. First operand 312 states and 939 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:06,087 INFO L93 Difference]: Finished difference Result 472 states and 1411 transitions. [2022-02-11 00:32:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:32:06,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:06,089 INFO L225 Difference]: With dead ends: 472 [2022-02-11 00:32:06,089 INFO L226 Difference]: Without dead ends: 433 [2022-02-11 00:32:06,089 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:32:06,089 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:06,090 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 163 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-02-11 00:32:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 317. [2022-02-11 00:32:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.018987341772152) internal successors, (954), 316 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 954 transitions. [2022-02-11 00:32:06,095 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 954 transitions. Word has length 20 [2022-02-11 00:32:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:06,095 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 954 transitions. [2022-02-11 00:32:06,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 954 transitions. [2022-02-11 00:32:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:06,096 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:06,096 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:06,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-11 00:32:06,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:06,313 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash 150420756, now seen corresponding path program 6 times [2022-02-11 00:32:06,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:06,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378514586] [2022-02-11 00:32:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:06,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:06,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:06,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378514586] [2022-02-11 00:32:06,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378514586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:06,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044877416] [2022-02-11 00:32:06,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:06,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:06,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:06,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:06,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:32:06,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:32:06,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:32:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:06,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 197 [2022-02-11 00:32:07,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:32:07,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 159 [2022-02-11 00:32:07,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:32:07,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 152 [2022-02-11 00:32:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:07,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:08,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:08,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 204 [2022-02-11 00:32:08,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:32:08,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:08,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 60 [2022-02-11 00:32:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:08,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044877416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:08,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:08,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 24 [2022-02-11 00:32:08,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627268339] [2022-02-11 00:32:08,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:08,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:32:08,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:32:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:32:08,731 INFO L87 Difference]: Start difference. First operand 317 states and 954 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:11,249 INFO L93 Difference]: Finished difference Result 876 states and 2527 transitions. [2022-02-11 00:32:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:32:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:11,262 INFO L225 Difference]: With dead ends: 876 [2022-02-11 00:32:11,262 INFO L226 Difference]: Without dead ends: 704 [2022-02-11 00:32:11,263 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:32:11,263 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 160 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:11,264 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 522 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:32:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-11 00:32:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 350. [2022-02-11 00:32:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.04297994269341) internal successors, (1062), 349 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1062 transitions. [2022-02-11 00:32:11,273 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1062 transitions. Word has length 20 [2022-02-11 00:32:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:11,273 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1062 transitions. [2022-02-11 00:32:11,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1062 transitions. [2022-02-11 00:32:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:11,274 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:11,274 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:11,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:11,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:11,487 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -903528158, now seen corresponding path program 7 times [2022-02-11 00:32:11,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:11,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086027414] [2022-02-11 00:32:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:11,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:11,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086027414] [2022-02-11 00:32:11,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086027414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:11,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607326709] [2022-02-11 00:32:11,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:11,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:11,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:11,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:11,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:32:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:11,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:11,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:32:11,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-02-11 00:32:12,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:32:12,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 146 [2022-02-11 00:32:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:12,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:12,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 203 [2022-02-11 00:32:12,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 238 [2022-02-11 00:32:12,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:12,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 229 [2022-02-11 00:32:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:13,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607326709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:13,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:13,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-11 00:32:13,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175684684] [2022-02-11 00:32:13,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:13,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:32:13,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:13,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:32:13,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:13,225 INFO L87 Difference]: Start difference. First operand 350 states and 1062 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:14,054 INFO L93 Difference]: Finished difference Result 783 states and 2214 transitions. [2022-02-11 00:32:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:32:14,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:14,081 INFO L225 Difference]: With dead ends: 783 [2022-02-11 00:32:14,081 INFO L226 Difference]: Without dead ends: 655 [2022-02-11 00:32:14,082 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:32:14,082 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:14,084 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 275 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-11 00:32:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 364. [2022-02-11 00:32:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.0853994490358128) internal successors, (1120), 363 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1120 transitions. [2022-02-11 00:32:14,092 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1120 transitions. Word has length 20 [2022-02-11 00:32:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1120 transitions. [2022-02-11 00:32:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1120 transitions. [2022-02-11 00:32:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:14,093 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:14,093 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:14,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:14,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-11 00:32:14,312 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash -429455834, now seen corresponding path program 8 times [2022-02-11 00:32:14,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:14,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792912669] [2022-02-11 00:32:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:14,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:14,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:14,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792912669] [2022-02-11 00:32:14,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792912669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:14,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786231266] [2022-02-11 00:32:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:14,384 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:14,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:32:14,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:14,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 153 [2022-02-11 00:32:14,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 158 [2022-02-11 00:32:14,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-02-11 00:32:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:14,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:14,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-02-11 00:32:15,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:15,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-02-11 00:32:15,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-02-11 00:32:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:15,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786231266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:15,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:15,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:32:15,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855442207] [2022-02-11 00:32:15,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:15,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:15,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:15,504 INFO L87 Difference]: Start difference. First operand 364 states and 1120 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:15,847 INFO L93 Difference]: Finished difference Result 641 states and 1886 transitions. [2022-02-11 00:32:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:32:15,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:15,849 INFO L225 Difference]: With dead ends: 641 [2022-02-11 00:32:15,849 INFO L226 Difference]: Without dead ends: 511 [2022-02-11 00:32:15,849 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:15,849 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:15,849 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 154 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-11 00:32:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 369. [2022-02-11 00:32:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0842391304347827) internal successors, (1135), 368 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1135 transitions. [2022-02-11 00:32:15,855 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1135 transitions. Word has length 20 [2022-02-11 00:32:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:15,855 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1135 transitions. [2022-02-11 00:32:15,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1135 transitions. [2022-02-11 00:32:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:15,856 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:15,856 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:15,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:16,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-11 00:32:16,056 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2074195750, now seen corresponding path program 9 times [2022-02-11 00:32:16,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:16,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243905903] [2022-02-11 00:32:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:16,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:16,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:16,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243905903] [2022-02-11 00:32:16,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243905903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:16,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306167079] [2022-02-11 00:32:16,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:16,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:16,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:16,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:32:16,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:32:16,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:16,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:16,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 192 [2022-02-11 00:32:16,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 277 [2022-02-11 00:32:16,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 222 [2022-02-11 00:32:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:16,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:17,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 218 [2022-02-11 00:32:17,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:17,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-02-11 00:32:17,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-02-11 00:32:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:17,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306167079] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:17,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:17,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:32:17,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871241452] [2022-02-11 00:32:17,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:17,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:32:17,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:32:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:32:17,733 INFO L87 Difference]: Start difference. First operand 369 states and 1135 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:18,243 INFO L93 Difference]: Finished difference Result 843 states and 2465 transitions. [2022-02-11 00:32:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:32:18,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:18,245 INFO L225 Difference]: With dead ends: 843 [2022-02-11 00:32:18,246 INFO L226 Difference]: Without dead ends: 698 [2022-02-11 00:32:18,246 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:32:18,246 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 273 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:18,246 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 167 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-11 00:32:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 378. [2022-02-11 00:32:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.1061007957559683) internal successors, (1171), 377 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1171 transitions. [2022-02-11 00:32:18,253 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1171 transitions. Word has length 20 [2022-02-11 00:32:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:18,253 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1171 transitions. [2022-02-11 00:32:18,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1171 transitions. [2022-02-11 00:32:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:18,254 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:18,254 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:18,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:18,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 00:32:18,483 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash -607204812, now seen corresponding path program 10 times [2022-02-11 00:32:18,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:18,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065767336] [2022-02-11 00:32:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:18,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:18,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065767336] [2022-02-11 00:32:18,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065767336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:18,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086949194] [2022-02-11 00:32:18,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:18,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:18,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:18,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:18,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:32:18,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:18,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:18,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 159 [2022-02-11 00:32:18,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:32:18,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 124 [2022-02-11 00:32:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:19,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:19,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-02-11 00:32:19,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 290 [2022-02-11 00:32:19,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:19,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 259 [2022-02-11 00:32:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:20,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086949194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:20,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:20,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:32:20,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037653545] [2022-02-11 00:32:20,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:20,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:32:20,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:32:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:32:20,063 INFO L87 Difference]: Start difference. First operand 378 states and 1171 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:20,287 INFO L93 Difference]: Finished difference Result 654 states and 1943 transitions. [2022-02-11 00:32:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:32:20,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:20,289 INFO L225 Difference]: With dead ends: 654 [2022-02-11 00:32:20,289 INFO L226 Difference]: Without dead ends: 534 [2022-02-11 00:32:20,290 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:20,296 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:20,297 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 154 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-02-11 00:32:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 369. [2022-02-11 00:32:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0842391304347827) internal successors, (1135), 368 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1135 transitions. [2022-02-11 00:32:20,303 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1135 transitions. Word has length 20 [2022-02-11 00:32:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:20,303 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1135 transitions. [2022-02-11 00:32:20,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1135 transitions. [2022-02-11 00:32:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:20,304 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:20,304 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:20,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:20,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 00:32:20,520 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1630065868, now seen corresponding path program 11 times [2022-02-11 00:32:20,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:20,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913259835] [2022-02-11 00:32:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:20,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:20,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:20,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913259835] [2022-02-11 00:32:20,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913259835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:20,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703357664] [2022-02-11 00:32:20,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:20,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:20,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:20,612 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:20,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:32:20,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:32:20,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:20,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:20,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:20,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-02-11 00:32:20,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:32:20,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:32:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:21,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:21,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-02-11 00:32:21,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:21,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 238 [2022-02-11 00:32:21,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:32:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:21,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703357664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:21,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:21,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-11 00:32:21,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338022208] [2022-02-11 00:32:21,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:21,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:32:21,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:32:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:32:21,664 INFO L87 Difference]: Start difference. First operand 369 states and 1135 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:21,812 INFO L93 Difference]: Finished difference Result 520 states and 1591 transitions. [2022-02-11 00:32:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-11 00:32:21,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:21,822 INFO L225 Difference]: With dead ends: 520 [2022-02-11 00:32:21,822 INFO L226 Difference]: Without dead ends: 481 [2022-02-11 00:32:21,822 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:21,822 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:21,823 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 84 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:32:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-02-11 00:32:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 376. [2022-02-11 00:32:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.0853333333333333) internal successors, (1157), 375 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1157 transitions. [2022-02-11 00:32:21,829 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1157 transitions. Word has length 20 [2022-02-11 00:32:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:21,830 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1157 transitions. [2022-02-11 00:32:21,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1157 transitions. [2022-02-11 00:32:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:21,830 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:21,830 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:21,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-11 00:32:22,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:22,042 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:22,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1489410784, now seen corresponding path program 12 times [2022-02-11 00:32:22,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:22,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536375897] [2022-02-11 00:32:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:22,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:22,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536375897] [2022-02-11 00:32:22,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536375897] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:22,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704090809] [2022-02-11 00:32:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:22,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:22,135 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:22,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:32:22,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:32:22,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 00:32:22,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:22,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:32:22,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-02-11 00:32:22,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 194 [2022-02-11 00:32:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:22,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:22,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 208 [2022-02-11 00:32:23,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:23,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 208 [2022-02-11 00:32:23,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-02-11 00:32:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:23,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704090809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:23,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:23,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:32:23,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020667309] [2022-02-11 00:32:23,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:23,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:23,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:23,560 INFO L87 Difference]: Start difference. First operand 376 states and 1157 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:24,201 INFO L93 Difference]: Finished difference Result 974 states and 2755 transitions. [2022-02-11 00:32:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:32:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:24,204 INFO L225 Difference]: With dead ends: 974 [2022-02-11 00:32:24,204 INFO L226 Difference]: Without dead ends: 830 [2022-02-11 00:32:24,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:24,205 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:24,205 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 202 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-02-11 00:32:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 407. [2022-02-11 00:32:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1945812807881775) internal successors, (1297), 406 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1297 transitions. [2022-02-11 00:32:24,213 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1297 transitions. Word has length 20 [2022-02-11 00:32:24,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:24,213 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1297 transitions. [2022-02-11 00:32:24,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1297 transitions. [2022-02-11 00:32:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 00:32:24,214 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:24,214 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:24,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:24,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-02-11 00:32:24,433 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash 124155950, now seen corresponding path program 13 times [2022-02-11 00:32:24,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:24,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128907154] [2022-02-11 00:32:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:24,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:24,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128907154] [2022-02-11 00:32:24,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128907154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:24,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057468534] [2022-02-11 00:32:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:24,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:24,505 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:24,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:32:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:24,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:32:24,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:24,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 237 [2022-02-11 00:32:24,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:32:24,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 138 [2022-02-11 00:32:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:25,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:25,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 131 [2022-02-11 00:32:25,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-02-11 00:32:25,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:25,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 168 [2022-02-11 00:32:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:25,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057468534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:25,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:25,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:32:25,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218453268] [2022-02-11 00:32:25,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:25,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:25,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:25,721 INFO L87 Difference]: Start difference. First operand 407 states and 1297 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:25,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:25,862 INFO L93 Difference]: Finished difference Result 552 states and 1668 transitions. [2022-02-11 00:32:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:32:25,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-11 00:32:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:25,864 INFO L225 Difference]: With dead ends: 552 [2022-02-11 00:32:25,864 INFO L226 Difference]: Without dead ends: 432 [2022-02-11 00:32:25,865 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:25,866 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:25,866 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 109 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:32:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-02-11 00:32:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 407. [2022-02-11 00:32:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1724137931034484) internal successors, (1288), 406 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1288 transitions. [2022-02-11 00:32:25,900 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1288 transitions. Word has length 20 [2022-02-11 00:32:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:25,900 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1288 transitions. [2022-02-11 00:32:25,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1288 transitions. [2022-02-11 00:32:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:25,901 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:25,901 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:25,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-11 00:32:26,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:26,119 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:26,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1803651538, now seen corresponding path program 14 times [2022-02-11 00:32:26,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:26,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851547936] [2022-02-11 00:32:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:26,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:26,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:26,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851547936] [2022-02-11 00:32:26,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851547936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:26,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448476017] [2022-02-11 00:32:26,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:26,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:26,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:26,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:32:26,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:26,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:26,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:26,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:26,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:32:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:26,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:26,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-02-11 00:32:26,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:26,678 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:32:26,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:32:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:26,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448476017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:26,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:26,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 17 [2022-02-11 00:32:26,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182087285] [2022-02-11 00:32:26,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:26,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:32:26,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:26,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:32:26,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:32:26,680 INFO L87 Difference]: Start difference. First operand 407 states and 1288 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:27,203 INFO L93 Difference]: Finished difference Result 851 states and 2578 transitions. [2022-02-11 00:32:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:32:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:27,207 INFO L225 Difference]: With dead ends: 851 [2022-02-11 00:32:27,207 INFO L226 Difference]: Without dead ends: 773 [2022-02-11 00:32:27,207 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:32:27,208 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:27,208 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 284 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-02-11 00:32:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 394. [2022-02-11 00:32:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.2111959287531806) internal successors, (1262), 393 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1262 transitions. [2022-02-11 00:32:27,216 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1262 transitions. Word has length 21 [2022-02-11 00:32:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:27,216 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1262 transitions. [2022-02-11 00:32:27,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1262 transitions. [2022-02-11 00:32:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:27,220 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:27,220 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:27,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:27,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:27,438 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1064525268, now seen corresponding path program 15 times [2022-02-11 00:32:27,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:27,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814110722] [2022-02-11 00:32:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:27,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:27,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:27,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814110722] [2022-02-11 00:32:27,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814110722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:27,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762713585] [2022-02-11 00:32:27,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:27,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:27,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:27,583 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:27,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 00:32:27,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:32:27,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:27,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:27,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:32:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:27,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:27,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-02-11 00:32:28,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:28,228 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:32:28,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:32:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:28,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762713585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:28,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:28,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-02-11 00:32:28,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953064352] [2022-02-11 00:32:28,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:28,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:32:28,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:32:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:28,231 INFO L87 Difference]: Start difference. First operand 394 states and 1262 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:29,348 INFO L93 Difference]: Finished difference Result 938 states and 2859 transitions. [2022-02-11 00:32:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:32:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:29,351 INFO L225 Difference]: With dead ends: 938 [2022-02-11 00:32:29,351 INFO L226 Difference]: Without dead ends: 852 [2022-02-11 00:32:29,352 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=1300, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:32:29,352 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:29,352 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 315 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:32:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-02-11 00:32:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 404. [2022-02-11 00:32:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.228287841191067) internal successors, (1301), 403 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1301 transitions. [2022-02-11 00:32:29,359 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1301 transitions. Word has length 21 [2022-02-11 00:32:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:29,359 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1301 transitions. [2022-02-11 00:32:29,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1301 transitions. [2022-02-11 00:32:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:29,360 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:29,360 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:29,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:29,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-11 00:32:29,577 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:29,577 INFO L85 PathProgramCache]: Analyzing trace with hash 110965376, now seen corresponding path program 16 times [2022-02-11 00:32:29,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:29,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200577305] [2022-02-11 00:32:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:29,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:29,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200577305] [2022-02-11 00:32:29,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200577305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:29,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181081567] [2022-02-11 00:32:29,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:29,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:29,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:29,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:29,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 00:32:29,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:29,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:29,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:29,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:29,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:29,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 186 [2022-02-11 00:32:29,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-02-11 00:32:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:29,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:30,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-02-11 00:32:30,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:30,363 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:32:30,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:32:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:30,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181081567] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:30,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:30,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-02-11 00:32:30,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995848737] [2022-02-11 00:32:30,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:30,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:30,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:30,367 INFO L87 Difference]: Start difference. First operand 404 states and 1301 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:30,624 INFO L93 Difference]: Finished difference Result 689 states and 2111 transitions. [2022-02-11 00:32:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:32:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:30,627 INFO L225 Difference]: With dead ends: 689 [2022-02-11 00:32:30,627 INFO L226 Difference]: Without dead ends: 638 [2022-02-11 00:32:30,627 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:32:30,627 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:30,627 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 121 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-11 00:32:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 414. [2022-02-11 00:32:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.2687651331719128) internal successors, (1350), 413 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1350 transitions. [2022-02-11 00:32:30,634 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1350 transitions. Word has length 21 [2022-02-11 00:32:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:30,634 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1350 transitions. [2022-02-11 00:32:30,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1350 transitions. [2022-02-11 00:32:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:30,635 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:30,635 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:30,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-11 00:32:30,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:30,851 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1724532110, now seen corresponding path program 17 times [2022-02-11 00:32:30,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:30,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170849826] [2022-02-11 00:32:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:30,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:30,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:30,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170849826] [2022-02-11 00:32:30,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170849826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:30,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421833955] [2022-02-11 00:32:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:30,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:30,999 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:31,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 00:32:31,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:32:31,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:31,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:31,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:32:31,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 117 [2022-02-11 00:32:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:31,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 285 [2022-02-11 00:32:31,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:31,899 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:32:31,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:32:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:31,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421833955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:31,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:31,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-02-11 00:32:31,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129766250] [2022-02-11 00:32:31,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:31,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:32:31,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:32:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:31,903 INFO L87 Difference]: Start difference. First operand 414 states and 1350 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:33,343 INFO L93 Difference]: Finished difference Result 1007 states and 2958 transitions. [2022-02-11 00:32:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:32:33,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:33,351 INFO L225 Difference]: With dead ends: 1007 [2022-02-11 00:32:33,351 INFO L226 Difference]: Without dead ends: 812 [2022-02-11 00:32:33,352 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=537, Invalid=2219, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:32:33,352 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:33,352 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 306 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:32:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-02-11 00:32:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 422. [2022-02-11 00:32:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.2066508313539193) internal successors, (1350), 421 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1350 transitions. [2022-02-11 00:32:33,360 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1350 transitions. Word has length 21 [2022-02-11 00:32:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:33,360 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1350 transitions. [2022-02-11 00:32:33,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1350 transitions. [2022-02-11 00:32:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:33,361 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:33,361 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:33,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:33,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:33,563 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash 763550390, now seen corresponding path program 18 times [2022-02-11 00:32:33,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:33,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28630296] [2022-02-11 00:32:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:33,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:33,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28630296] [2022-02-11 00:32:33,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28630296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:33,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377125025] [2022-02-11 00:32:33,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:33,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:33,735 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 00:32:33,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:32:33,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:33,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-02-11 00:32:33,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 00:32:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:34,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:34,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 284 [2022-02-11 00:32:34,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:34,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 265 [2022-02-11 00:32:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:34,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377125025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:34,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:34,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-02-11 00:32:34,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765514542] [2022-02-11 00:32:34,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:34,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:32:34,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:34,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:32:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:32:34,429 INFO L87 Difference]: Start difference. First operand 422 states and 1350 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:35,301 INFO L93 Difference]: Finished difference Result 1091 states and 3208 transitions. [2022-02-11 00:32:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:32:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:35,303 INFO L225 Difference]: With dead ends: 1091 [2022-02-11 00:32:35,304 INFO L226 Difference]: Without dead ends: 842 [2022-02-11 00:32:35,304 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=454, Invalid=1802, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:32:35,305 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:35,305 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 283 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-02-11 00:32:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 495. [2022-02-11 00:32:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.133603238866397) internal successors, (1548), 494 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1548 transitions. [2022-02-11 00:32:35,313 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1548 transitions. Word has length 21 [2022-02-11 00:32:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:35,314 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1548 transitions. [2022-02-11 00:32:35,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1548 transitions. [2022-02-11 00:32:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:35,316 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:35,316 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:35,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:35,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:35,532 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:35,532 INFO L85 PathProgramCache]: Analyzing trace with hash -76145436, now seen corresponding path program 19 times [2022-02-11 00:32:35,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:35,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018037782] [2022-02-11 00:32:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:35,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:35,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018037782] [2022-02-11 00:32:35,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018037782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:35,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764648734] [2022-02-11 00:32:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:35,609 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:35,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 00:32:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:35,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:35,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:35,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-11 00:32:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:35,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:35,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 173 [2022-02-11 00:32:36,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:36,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:32:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:36,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764648734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:36,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:36,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-11 00:32:36,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968707917] [2022-02-11 00:32:36,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:36,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:32:36,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:32:36,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:36,319 INFO L87 Difference]: Start difference. First operand 495 states and 1548 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:36,539 INFO L93 Difference]: Finished difference Result 705 states and 2177 transitions. [2022-02-11 00:32:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:32:36,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:36,541 INFO L225 Difference]: With dead ends: 705 [2022-02-11 00:32:36,541 INFO L226 Difference]: Without dead ends: 653 [2022-02-11 00:32:36,541 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:36,542 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:36,543 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 116 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-11 00:32:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 539. [2022-02-11 00:32:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.1617100371747213) internal successors, (1701), 538 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1701 transitions. [2022-02-11 00:32:36,570 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1701 transitions. Word has length 21 [2022-02-11 00:32:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:36,570 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1701 transitions. [2022-02-11 00:32:36,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1701 transitions. [2022-02-11 00:32:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:36,571 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:36,571 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:36,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:36,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-11 00:32:36,793 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:36,793 INFO L85 PathProgramCache]: Analyzing trace with hash 266104058, now seen corresponding path program 20 times [2022-02-11 00:32:36,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:36,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130613174] [2022-02-11 00:32:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:36,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:36,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130613174] [2022-02-11 00:32:36,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130613174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:36,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519327337] [2022-02-11 00:32:36,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:36,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:36,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:36,880 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:36,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 00:32:36,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:36,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:37,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 129 [2022-02-11 00:32:37,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 113 [2022-02-11 00:32:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:37,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:37,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-02-11 00:32:37,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:37,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-02-11 00:32:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:37,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519327337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:37,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:37,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-11 00:32:37,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666827247] [2022-02-11 00:32:37,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:37,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:32:37,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:37,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:32:37,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:37,518 INFO L87 Difference]: Start difference. First operand 539 states and 1701 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:37,768 INFO L93 Difference]: Finished difference Result 809 states and 2493 transitions. [2022-02-11 00:32:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:32:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:37,770 INFO L225 Difference]: With dead ends: 809 [2022-02-11 00:32:37,770 INFO L226 Difference]: Without dead ends: 742 [2022-02-11 00:32:37,770 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:32:37,770 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:37,771 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-02-11 00:32:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 567. [2022-02-11 00:32:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.234982332155477) internal successors, (1831), 566 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1831 transitions. [2022-02-11 00:32:37,779 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1831 transitions. Word has length 21 [2022-02-11 00:32:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:37,779 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1831 transitions. [2022-02-11 00:32:37,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1831 transitions. [2022-02-11 00:32:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:37,781 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:37,781 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:37,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:37,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 00:32:37,996 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1940063640, now seen corresponding path program 21 times [2022-02-11 00:32:37,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:37,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346906772] [2022-02-11 00:32:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:38,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:38,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346906772] [2022-02-11 00:32:38,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346906772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:38,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087307255] [2022-02-11 00:32:38,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:38,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:38,167 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 00:32:38,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:32:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:38,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 129 [2022-02-11 00:32:38,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 113 [2022-02-11 00:32:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:38,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:38,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 216 [2022-02-11 00:32:38,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:38,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:32:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:38,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087307255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:38,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:38,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-02-11 00:32:38,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597788990] [2022-02-11 00:32:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:38,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:32:38,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:32:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:32:38,878 INFO L87 Difference]: Start difference. First operand 567 states and 1831 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:39,450 INFO L93 Difference]: Finished difference Result 933 states and 2786 transitions. [2022-02-11 00:32:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:32:39,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:39,452 INFO L225 Difference]: With dead ends: 933 [2022-02-11 00:32:39,452 INFO L226 Difference]: Without dead ends: 881 [2022-02-11 00:32:39,453 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:32:39,453 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:39,453 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 249 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-02-11 00:32:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 545. [2022-02-11 00:32:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.198529411764706) internal successors, (1740), 544 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1740 transitions. [2022-02-11 00:32:39,462 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1740 transitions. Word has length 21 [2022-02-11 00:32:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:39,462 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1740 transitions. [2022-02-11 00:32:39,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1740 transitions. [2022-02-11 00:32:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:39,463 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:39,463 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:39,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:39,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 00:32:39,679 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash 64137700, now seen corresponding path program 22 times [2022-02-11 00:32:39,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:39,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057632038] [2022-02-11 00:32:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:39,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:39,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:39,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057632038] [2022-02-11 00:32:39,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057632038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:39,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94929911] [2022-02-11 00:32:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:39,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:39,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:39,777 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:39,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 00:32:39,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:39,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:39,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:39,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-02-11 00:32:40,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 00:32:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:40,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:40,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-02-11 00:32:40,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:40,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 221 [2022-02-11 00:32:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:40,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94929911] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:40,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:40,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-02-11 00:32:40,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300427542] [2022-02-11 00:32:40,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:40,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:32:40,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:40,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:32:40,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:32:40,609 INFO L87 Difference]: Start difference. First operand 545 states and 1740 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:40,827 INFO L93 Difference]: Finished difference Result 794 states and 2413 transitions. [2022-02-11 00:32:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:32:40,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:40,829 INFO L225 Difference]: With dead ends: 794 [2022-02-11 00:32:40,829 INFO L226 Difference]: Without dead ends: 706 [2022-02-11 00:32:40,829 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:32:40,829 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:40,829 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 149 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:32:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-11 00:32:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 556. [2022-02-11 00:32:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.218018018018018) internal successors, (1786), 555 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1786 transitions. [2022-02-11 00:32:40,837 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1786 transitions. Word has length 21 [2022-02-11 00:32:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:40,838 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1786 transitions. [2022-02-11 00:32:40,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1786 transitions. [2022-02-11 00:32:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:40,839 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:40,839 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:40,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:41,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:41,055 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 417277190, now seen corresponding path program 23 times [2022-02-11 00:32:41,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:41,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443013793] [2022-02-11 00:32:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:41,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:41,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443013793] [2022-02-11 00:32:41,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443013793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:41,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639305444] [2022-02-11 00:32:41,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:41,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:41,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:41,150 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:41,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 00:32:41,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:41,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:41,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:41,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 147 [2022-02-11 00:32:41,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-11 00:32:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:41,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:41,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 173 [2022-02-11 00:32:41,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:32:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:41,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639305444] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:41,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:41,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-11 00:32:41,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441895586] [2022-02-11 00:32:41,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:41,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:32:41,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:41,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:32:41,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:41,709 INFO L87 Difference]: Start difference. First operand 556 states and 1786 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:42,009 INFO L93 Difference]: Finished difference Result 929 states and 2821 transitions. [2022-02-11 00:32:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:32:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:42,011 INFO L225 Difference]: With dead ends: 929 [2022-02-11 00:32:42,011 INFO L226 Difference]: Without dead ends: 862 [2022-02-11 00:32:42,011 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:32:42,012 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:42,012 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 171 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-02-11 00:32:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 586. [2022-02-11 00:32:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.2786324786324785) internal successors, (1918), 585 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1918 transitions. [2022-02-11 00:32:42,022 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1918 transitions. Word has length 21 [2022-02-11 00:32:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:42,022 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1918 transitions. [2022-02-11 00:32:42,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1918 transitions. [2022-02-11 00:32:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:42,023 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:42,023 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:42,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:42,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:42,239 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2091236772, now seen corresponding path program 24 times [2022-02-11 00:32:42,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:42,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288175123] [2022-02-11 00:32:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:42,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:42,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288175123] [2022-02-11 00:32:42,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288175123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:42,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940807529] [2022-02-11 00:32:42,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:42,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:42,344 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:42,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 00:32:42,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:32:42,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:42,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-02-11 00:32:42,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:32:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:42,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:42,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-02-11 00:32:42,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:42,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 180 [2022-02-11 00:32:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:43,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940807529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:43,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:43,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-11 00:32:43,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831272406] [2022-02-11 00:32:43,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:43,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:32:43,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:32:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:43,151 INFO L87 Difference]: Start difference. First operand 586 states and 1918 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:43,385 INFO L93 Difference]: Finished difference Result 802 states and 2476 transitions. [2022-02-11 00:32:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:32:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:43,387 INFO L225 Difference]: With dead ends: 802 [2022-02-11 00:32:43,387 INFO L226 Difference]: Without dead ends: 750 [2022-02-11 00:32:43,387 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:32:43,388 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:43,388 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 132 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-02-11 00:32:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 546. [2022-02-11 00:32:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 3.2091743119266054) internal successors, (1749), 545 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1749 transitions. [2022-02-11 00:32:43,396 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1749 transitions. Word has length 21 [2022-02-11 00:32:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:43,396 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1749 transitions. [2022-02-11 00:32:43,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1749 transitions. [2022-02-11 00:32:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:43,397 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:43,397 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:43,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:43,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-11 00:32:43,597 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1916574138, now seen corresponding path program 25 times [2022-02-11 00:32:43,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:43,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405290738] [2022-02-11 00:32:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:43,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:43,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:43,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405290738] [2022-02-11 00:32:43,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405290738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:43,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117016224] [2022-02-11 00:32:43,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:43,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:43,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:43,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:43,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 00:32:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:43,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:32:43,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-02-11 00:32:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:44,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:44,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 277 [2022-02-11 00:32:44,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:44,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 250 [2022-02-11 00:32:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:44,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117016224] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:44,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:44,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-02-11 00:32:44,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889188182] [2022-02-11 00:32:44,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:44,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:32:44,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:32:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:44,614 INFO L87 Difference]: Start difference. First operand 546 states and 1749 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:45,296 INFO L93 Difference]: Finished difference Result 1185 states and 3570 transitions. [2022-02-11 00:32:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:32:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:45,298 INFO L225 Difference]: With dead ends: 1185 [2022-02-11 00:32:45,298 INFO L226 Difference]: Without dead ends: 1118 [2022-02-11 00:32:45,299 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:32:45,299 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 217 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:45,299 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 182 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:32:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-02-11 00:32:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 588. [2022-02-11 00:32:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.2964224872231687) internal successors, (1935), 587 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1935 transitions. [2022-02-11 00:32:45,317 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1935 transitions. Word has length 21 [2022-02-11 00:32:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:45,318 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1935 transitions. [2022-02-11 00:32:45,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1935 transitions. [2022-02-11 00:32:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:45,319 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:45,319 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:45,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-11 00:32:45,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-02-11 00:32:45,535 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash -704433576, now seen corresponding path program 26 times [2022-02-11 00:32:45,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:45,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835830907] [2022-02-11 00:32:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:45,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:45,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835830907] [2022-02-11 00:32:45,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835830907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:45,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919234430] [2022-02-11 00:32:45,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:45,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:45,705 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:45,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 00:32:45,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:45,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:45,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:45,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:45,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 231 [2022-02-11 00:32:46,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-11 00:32:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:46,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:46,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:46,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-02-11 00:32:46,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-02-11 00:32:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:46,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919234430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:46,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:46,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-02-11 00:32:46,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581607187] [2022-02-11 00:32:46,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:46,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:32:46,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:32:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:32:46,565 INFO L87 Difference]: Start difference. First operand 588 states and 1935 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:47,107 INFO L93 Difference]: Finished difference Result 1175 states and 3546 transitions. [2022-02-11 00:32:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:32:47,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:47,109 INFO L225 Difference]: With dead ends: 1175 [2022-02-11 00:32:47,110 INFO L226 Difference]: Without dead ends: 1087 [2022-02-11 00:32:47,110 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:32:47,112 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 222 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:47,113 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 229 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-02-11 00:32:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 541. [2022-02-11 00:32:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 3.238888888888889) internal successors, (1749), 540 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1749 transitions. [2022-02-11 00:32:47,141 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1749 transitions. Word has length 21 [2022-02-11 00:32:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:47,141 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1749 transitions. [2022-02-11 00:32:47,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1749 transitions. [2022-02-11 00:32:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:47,142 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:47,142 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:47,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:47,342 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1854422378, now seen corresponding path program 27 times [2022-02-11 00:32:47,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:47,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532660850] [2022-02-11 00:32:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:47,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:47,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532660850] [2022-02-11 00:32:47,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532660850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:47,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289953517] [2022-02-11 00:32:47,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:47,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:47,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:47,420 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:47,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 00:32:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:32:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:32:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:47,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 189 [2022-02-11 00:32:47,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 00:32:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:47,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:48,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 216 [2022-02-11 00:32:48,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:48,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 193 [2022-02-11 00:32:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:48,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289953517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:48,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:48,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:32:48,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959074483] [2022-02-11 00:32:48,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:48,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:48,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:48,254 INFO L87 Difference]: Start difference. First operand 541 states and 1749 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:48,425 INFO L93 Difference]: Finished difference Result 872 states and 2663 transitions. [2022-02-11 00:32:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:32:48,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:48,427 INFO L225 Difference]: With dead ends: 872 [2022-02-11 00:32:48,427 INFO L226 Difference]: Without dead ends: 792 [2022-02-11 00:32:48,427 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:48,428 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:48,428 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 119 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:32:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-02-11 00:32:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 493. [2022-02-11 00:32:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1930894308943087) internal successors, (1571), 492 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1571 transitions. [2022-02-11 00:32:48,435 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1571 transitions. Word has length 21 [2022-02-11 00:32:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:48,436 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1571 transitions. [2022-02-11 00:32:48,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1571 transitions. [2022-02-11 00:32:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:48,437 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:48,437 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:48,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-11 00:32:48,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:48,639 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash 216306962, now seen corresponding path program 28 times [2022-02-11 00:32:48,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:48,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179819150] [2022-02-11 00:32:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:48,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:48,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179819150] [2022-02-11 00:32:48,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179819150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:48,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408312053] [2022-02-11 00:32:48,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:48,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:48,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:48,743 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:48,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 00:32:48,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:48,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:48,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:48,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:32:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:48,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:49,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-02-11 00:32:49,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:49,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:32:49,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:49,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408312053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:49,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:49,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-02-11 00:32:49,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200309034] [2022-02-11 00:32:49,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:49,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:49,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:49,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:49,381 INFO L87 Difference]: Start difference. First operand 493 states and 1571 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:49,543 INFO L93 Difference]: Finished difference Result 698 states and 2178 transitions. [2022-02-11 00:32:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:32:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:49,560 INFO L225 Difference]: With dead ends: 698 [2022-02-11 00:32:49,560 INFO L226 Difference]: Without dead ends: 637 [2022-02-11 00:32:49,560 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:32:49,561 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:49,561 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 98 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:32:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-02-11 00:32:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 507. [2022-02-11 00:32:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.205533596837945) internal successors, (1622), 506 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1622 transitions. [2022-02-11 00:32:49,582 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1622 transitions. Word has length 21 [2022-02-11 00:32:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:49,582 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1622 transitions. [2022-02-11 00:32:49,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1622 transitions. [2022-02-11 00:32:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:49,583 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:49,583 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:49,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:49,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:49,784 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1391797606, now seen corresponding path program 29 times [2022-02-11 00:32:49,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:49,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119626940] [2022-02-11 00:32:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:49,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:49,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119626940] [2022-02-11 00:32:49,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119626940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:49,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678322222] [2022-02-11 00:32:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:49,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:49,870 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:49,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 00:32:49,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:32:49,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:49,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:50,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:32:50,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-02-11 00:32:50,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 170 [2022-02-11 00:32:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:50,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:50,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:32:50,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:50,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:32:50,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:50,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678322222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:50,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:50,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-02-11 00:32:50,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112943749] [2022-02-11 00:32:50,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:50,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:32:50,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:32:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:32:50,735 INFO L87 Difference]: Start difference. First operand 507 states and 1622 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:50,944 INFO L93 Difference]: Finished difference Result 736 states and 2283 transitions. [2022-02-11 00:32:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:32:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:50,946 INFO L225 Difference]: With dead ends: 736 [2022-02-11 00:32:50,946 INFO L226 Difference]: Without dead ends: 684 [2022-02-11 00:32:50,946 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:32:50,946 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:50,946 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 117 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 350 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-02-11 00:32:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-11 00:32:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 527. [2022-02-11 00:32:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.2395437262357416) internal successors, (1704), 526 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1704 transitions. [2022-02-11 00:32:50,954 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1704 transitions. Word has length 21 [2022-02-11 00:32:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:50,954 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1704 transitions. [2022-02-11 00:32:50,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1704 transitions. [2022-02-11 00:32:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:50,955 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:50,955 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:50,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:51,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-11 00:32:51,172 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1289602956, now seen corresponding path program 30 times [2022-02-11 00:32:51,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:51,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379737494] [2022-02-11 00:32:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:51,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:51,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379737494] [2022-02-11 00:32:51,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379737494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:51,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870839782] [2022-02-11 00:32:51,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:32:51,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:51,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:51,328 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:51,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 00:32:51,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:32:51,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:51,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:51,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:51,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:32:51,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 239 [2022-02-11 00:32:51,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-02-11 00:32:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:51,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:51,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 191 [2022-02-11 00:32:52,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:52,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:32:52,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:52,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870839782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:52,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:52,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-02-11 00:32:52,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425849847] [2022-02-11 00:32:52,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:32:52,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:32:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:32:52,214 INFO L87 Difference]: Start difference. First operand 527 states and 1704 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:52,926 INFO L93 Difference]: Finished difference Result 848 states and 2576 transitions. [2022-02-11 00:32:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:32:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:52,928 INFO L225 Difference]: With dead ends: 848 [2022-02-11 00:32:52,928 INFO L226 Difference]: Without dead ends: 668 [2022-02-11 00:32:52,929 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:32:52,929 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:52,930 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 258 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 627 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-02-11 00:32:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-11 00:32:52,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 528. [2022-02-11 00:32:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.2485768500948766) internal successors, (1712), 527 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1712 transitions. [2022-02-11 00:32:52,943 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1712 transitions. Word has length 21 [2022-02-11 00:32:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:52,943 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1712 transitions. [2022-02-11 00:32:52,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1712 transitions. [2022-02-11 00:32:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:52,944 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:52,944 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:52,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-11 00:32:53,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-11 00:32:53,160 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash -822698094, now seen corresponding path program 31 times [2022-02-11 00:32:53,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:53,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106058081] [2022-02-11 00:32:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:53,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:53,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106058081] [2022-02-11 00:32:53,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106058081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:53,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553615665] [2022-02-11 00:32:53,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:32:53,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:53,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:53,230 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:53,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 00:32:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:53,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 245 [2022-02-11 00:32:53,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:53,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:32:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:53,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:53,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:53,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:53,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 187 [2022-02-11 00:32:53,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 162 [2022-02-11 00:32:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:54,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553615665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:54,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:54,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-02-11 00:32:54,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340559223] [2022-02-11 00:32:54,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:54,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:32:54,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:32:54,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:32:54,216 INFO L87 Difference]: Start difference. First operand 528 states and 1712 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:54,489 INFO L93 Difference]: Finished difference Result 756 states and 2364 transitions. [2022-02-11 00:32:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:32:54,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:54,492 INFO L225 Difference]: With dead ends: 756 [2022-02-11 00:32:54,492 INFO L226 Difference]: Without dead ends: 704 [2022-02-11 00:32:54,493 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:32:54,493 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 111 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:54,494 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 101 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-11 00:32:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 534. [2022-02-11 00:32:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.2664165103189493) internal successors, (1741), 533 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1741 transitions. [2022-02-11 00:32:54,505 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1741 transitions. Word has length 21 [2022-02-11 00:32:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:54,505 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1741 transitions. [2022-02-11 00:32:54,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1741 transitions. [2022-02-11 00:32:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:54,506 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:54,506 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:54,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:54,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 00:32:54,722 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash 790868640, now seen corresponding path program 32 times [2022-02-11 00:32:54,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:54,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510108721] [2022-02-11 00:32:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:54,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:54,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:54,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510108721] [2022-02-11 00:32:54,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510108721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:54,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456496083] [2022-02-11 00:32:54,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:32:54,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:54,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:54,809 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:54,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 00:32:54,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:54,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:54,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:32:55,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:32:55,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:55,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:55,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:55,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:55,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 219 [2022-02-11 00:32:55,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 190 [2022-02-11 00:32:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:55,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456496083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:55,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:55,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-02-11 00:32:55,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564141864] [2022-02-11 00:32:55,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:55,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:55,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:55,558 INFO L87 Difference]: Start difference. First operand 534 states and 1741 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:55,723 INFO L93 Difference]: Finished difference Result 749 states and 2303 transitions. [2022-02-11 00:32:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:32:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:55,725 INFO L225 Difference]: With dead ends: 749 [2022-02-11 00:32:55,725 INFO L226 Difference]: Without dead ends: 694 [2022-02-11 00:32:55,725 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:32:55,726 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:55,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:32:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-11 00:32:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 530. [2022-02-11 00:32:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.2457466918714557) internal successors, (1717), 529 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1717 transitions. [2022-02-11 00:32:55,733 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1717 transitions. Word has length 21 [2022-02-11 00:32:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:55,733 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1717 transitions. [2022-02-11 00:32:55,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1717 transitions. [2022-02-11 00:32:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:55,734 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:55,734 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:55,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:55,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-02-11 00:32:55,949 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash -728170158, now seen corresponding path program 33 times [2022-02-11 00:32:55,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:55,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882693720] [2022-02-11 00:32:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:56,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:56,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882693720] [2022-02-11 00:32:56,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882693720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:56,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412177377] [2022-02-11 00:32:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:32:56,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:56,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:56,025 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:56,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 00:32:56,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:32:56,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:56,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 236 [2022-02-11 00:32:56,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-11 00:32:56,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:56,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:56,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:56,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:56,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 187 [2022-02-11 00:32:56,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 162 [2022-02-11 00:32:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:32:57,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412177377] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:57,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:57,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-11 00:32:57,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856869071] [2022-02-11 00:32:57,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:32:57,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:32:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:32:57,204 INFO L87 Difference]: Start difference. First operand 530 states and 1717 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:57,452 INFO L93 Difference]: Finished difference Result 650 states and 2036 transitions. [2022-02-11 00:32:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:32:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:57,453 INFO L225 Difference]: With dead ends: 650 [2022-02-11 00:32:57,453 INFO L226 Difference]: Without dead ends: 577 [2022-02-11 00:32:57,453 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:57,454 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:57,454 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 110 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-02-11 00:32:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 512. [2022-02-11 00:32:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.2407045009784734) internal successors, (1656), 511 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1656 transitions. [2022-02-11 00:32:57,460 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1656 transitions. Word has length 21 [2022-02-11 00:32:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:57,460 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1656 transitions. [2022-02-11 00:32:57,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:57,460 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1656 transitions. [2022-02-11 00:32:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:57,461 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:57,461 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:57,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:57,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:57,677 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash 108651494, now seen corresponding path program 34 times [2022-02-11 00:32:57,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:57,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768832329] [2022-02-11 00:32:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:57,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:57,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:57,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768832329] [2022-02-11 00:32:57,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768832329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:57,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075808726] [2022-02-11 00:32:57,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:32:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:57,761 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:57,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 00:32:57,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:32:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:57,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:57,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:58,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 237 [2022-02-11 00:32:58,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 205 [2022-02-11 00:32:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:58,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:58,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-02-11 00:32:58,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:58,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:32:58,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:58,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075808726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:58,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:58,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-02-11 00:32:58,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902922182] [2022-02-11 00:32:58,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:58,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:32:58,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:58,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:32:58,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:32:58,461 INFO L87 Difference]: Start difference. First operand 512 states and 1656 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:58,651 INFO L93 Difference]: Finished difference Result 737 states and 2299 transitions. [2022-02-11 00:32:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:32:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:58,653 INFO L225 Difference]: With dead ends: 737 [2022-02-11 00:32:58,653 INFO L226 Difference]: Without dead ends: 693 [2022-02-11 00:32:58,653 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:32:58,654 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:58,654 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 129 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:32:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-02-11 00:32:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 513. [2022-02-11 00:32:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.24609375) internal successors, (1662), 512 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1662 transitions. [2022-02-11 00:32:58,661 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1662 transitions. Word has length 21 [2022-02-11 00:32:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:58,661 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1662 transitions. [2022-02-11 00:32:58,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1662 transitions. [2022-02-11 00:32:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:58,662 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:58,662 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:58,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:58,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-11 00:32:58,879 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1722218228, now seen corresponding path program 35 times [2022-02-11 00:32:58,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:58,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171285169] [2022-02-11 00:32:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:32:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:58,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:32:58,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171285169] [2022-02-11 00:32:58,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171285169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:32:58,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645160422] [2022-02-11 00:32:58,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:32:58,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:58,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:32:58,976 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:32:58,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 00:32:59,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:32:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:32:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:32:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:32:59,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:32:59,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 151 [2022-02-11 00:32:59,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-02-11 00:32:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:59,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:32:59,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-02-11 00:32:59,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:32:59,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:32:59,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:32:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:32:59,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645160422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:32:59,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:32:59,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-02-11 00:32:59,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874106215] [2022-02-11 00:32:59,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:32:59,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:32:59,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:32:59,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:32:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:32:59,575 INFO L87 Difference]: Start difference. First operand 513 states and 1662 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:32:59,701 INFO L93 Difference]: Finished difference Result 653 states and 2037 transitions. [2022-02-11 00:32:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:32:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:32:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:32:59,703 INFO L225 Difference]: With dead ends: 653 [2022-02-11 00:32:59,703 INFO L226 Difference]: Without dead ends: 606 [2022-02-11 00:32:59,703 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:32:59,703 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:32:59,703 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 122 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:32:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-02-11 00:32:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 482. [2022-02-11 00:32:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.191268191268191) internal successors, (1535), 481 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1535 transitions. [2022-02-11 00:32:59,710 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1535 transitions. Word has length 21 [2022-02-11 00:32:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:32:59,710 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1535 transitions. [2022-02-11 00:32:59,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:32:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1535 transitions. [2022-02-11 00:32:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:32:59,711 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:32:59,711 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:32:59,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 00:32:59,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:32:59,927 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:32:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:32:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2061815264, now seen corresponding path program 36 times [2022-02-11 00:32:59,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:32:59,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043012200] [2022-02-11 00:32:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:32:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:32:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:00,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:00,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043012200] [2022-02-11 00:33:00,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043012200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:00,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509063617] [2022-02-11 00:33:00,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:00,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:00,049 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:00,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 00:33:00,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:33:00,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:00,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 129 [2022-02-11 00:33:00,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:33:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:00,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:00,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 224 [2022-02-11 00:33:00,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:00,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 213 [2022-02-11 00:33:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:00,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509063617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:00,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:00,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-02-11 00:33:00,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803946444] [2022-02-11 00:33:00,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:00,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:33:00,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:33:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:33:00,788 INFO L87 Difference]: Start difference. First operand 482 states and 1535 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:01,481 INFO L93 Difference]: Finished difference Result 1121 states and 3394 transitions. [2022-02-11 00:33:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:33:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:01,484 INFO L225 Difference]: With dead ends: 1121 [2022-02-11 00:33:01,484 INFO L226 Difference]: Without dead ends: 970 [2022-02-11 00:33:01,485 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:33:01,485 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 205 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:01,485 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 330 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:01,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-02-11 00:33:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 515. [2022-02-11 00:33:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.2392996108949417) internal successors, (1665), 514 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1665 transitions. [2022-02-11 00:33:01,493 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1665 transitions. Word has length 21 [2022-02-11 00:33:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:01,493 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1665 transitions. [2022-02-11 00:33:01,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1665 transitions. [2022-02-11 00:33:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:01,494 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:01,494 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:01,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:01,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:01,710 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 921136774, now seen corresponding path program 37 times [2022-02-11 00:33:01,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:01,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128235567] [2022-02-11 00:33:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:01,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:01,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:01,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128235567] [2022-02-11 00:33:01,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128235567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:01,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864390073] [2022-02-11 00:33:01,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:01,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:01,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:01,782 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:01,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 00:33:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:01,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:01,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:33:01,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:33:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:01,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:02,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 296 [2022-02-11 00:33:02,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:02,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:33:02,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:33:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:02,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864390073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:02,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:02,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-11 00:33:02,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049255838] [2022-02-11 00:33:02,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:02,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:33:02,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:02,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:33:02,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:33:02,472 INFO L87 Difference]: Start difference. First operand 515 states and 1665 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:02,622 INFO L93 Difference]: Finished difference Result 637 states and 2034 transitions. [2022-02-11 00:33:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:33:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:02,624 INFO L225 Difference]: With dead ends: 637 [2022-02-11 00:33:02,624 INFO L226 Difference]: Without dead ends: 576 [2022-02-11 00:33:02,624 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:33:02,624 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:02,624 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 107 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:33:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-02-11 00:33:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 488. [2022-02-11 00:33:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.240246406570842) internal successors, (1578), 487 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1578 transitions. [2022-02-11 00:33:02,630 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1578 transitions. Word has length 21 [2022-02-11 00:33:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:02,631 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1578 transitions. [2022-02-11 00:33:02,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1578 transitions. [2022-02-11 00:33:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:02,631 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:02,632 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:02,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:02,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-11 00:33:02,847 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2096627418, now seen corresponding path program 38 times [2022-02-11 00:33:02,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:02,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442566727] [2022-02-11 00:33:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:02,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:02,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:02,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442566727] [2022-02-11 00:33:02,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442566727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:02,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291275963] [2022-02-11 00:33:02,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:02,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:02,912 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:02,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 00:33:02,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:02,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:02,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:02,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:03,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:33:03,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-02-11 00:33:03,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 173 [2022-02-11 00:33:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:03,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:03,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-02-11 00:33:03,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:03,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:33:03,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:33:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:03,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291275963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:03,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:03,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:33:03,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879498204] [2022-02-11 00:33:03,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:03,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:33:03,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:33:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:33:03,708 INFO L87 Difference]: Start difference. First operand 488 states and 1578 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:03,810 INFO L93 Difference]: Finished difference Result 727 states and 2279 transitions. [2022-02-11 00:33:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:33:03,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:03,812 INFO L225 Difference]: With dead ends: 727 [2022-02-11 00:33:03,812 INFO L226 Difference]: Without dead ends: 675 [2022-02-11 00:33:03,812 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:33:03,813 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:03,813 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 66 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:33:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-11 00:33:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 490. [2022-02-11 00:33:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.2372188139059306) internal successors, (1583), 489 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1583 transitions. [2022-02-11 00:33:03,820 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1583 transitions. Word has length 21 [2022-02-11 00:33:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:03,820 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1583 transitions. [2022-02-11 00:33:03,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1583 transitions. [2022-02-11 00:33:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:03,821 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:03,821 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:03,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:04,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-11 00:33:04,037 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -584773144, now seen corresponding path program 39 times [2022-02-11 00:33:04,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:04,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41861824] [2022-02-11 00:33:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:04,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:04,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41861824] [2022-02-11 00:33:04,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41861824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:04,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134130360] [2022-02-11 00:33:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:04,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:04,144 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:04,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 00:33:04,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:33:04,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:04,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:04,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:04,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:33:04,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-02-11 00:33:04,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:33:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:04,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:04,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-02-11 00:33:04,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:04,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:33:04,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:33:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:04,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134130360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:04,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:04,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:33:04,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450339478] [2022-02-11 00:33:04,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:04,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:33:04,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:33:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:33:04,908 INFO L87 Difference]: Start difference. First operand 490 states and 1583 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:04,989 INFO L93 Difference]: Finished difference Result 611 states and 1920 transitions. [2022-02-11 00:33:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:33:04,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:04,990 INFO L225 Difference]: With dead ends: 611 [2022-02-11 00:33:04,990 INFO L226 Difference]: Without dead ends: 554 [2022-02-11 00:33:04,990 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:33:04,991 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:04,991 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 61 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:33:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-02-11 00:33:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 463. [2022-02-11 00:33:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1818181818181817) internal successors, (1470), 462 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1470 transitions. [2022-02-11 00:33:04,997 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1470 transitions. Word has length 21 [2022-02-11 00:33:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:04,997 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1470 transitions. [2022-02-11 00:33:04,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1470 transitions. [2022-02-11 00:33:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:04,998 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:04,998 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:05,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:05,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-11 00:33:05,207 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:05,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1917216036, now seen corresponding path program 40 times [2022-02-11 00:33:05,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:05,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344099579] [2022-02-11 00:33:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:05,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:05,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:05,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344099579] [2022-02-11 00:33:05,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344099579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:05,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398677036] [2022-02-11 00:33:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:05,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:05,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:05,309 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:05,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 00:33:05,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:05,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:05,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:33:05,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:33:05,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:33:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:05,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:05,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:33:05,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:05,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 221 [2022-02-11 00:33:05,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 192 [2022-02-11 00:33:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:06,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398677036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:06,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:06,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:33:06,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498601437] [2022-02-11 00:33:06,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:06,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:33:06,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:33:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:33:06,139 INFO L87 Difference]: Start difference. First operand 463 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:06,252 INFO L93 Difference]: Finished difference Result 616 states and 1877 transitions. [2022-02-11 00:33:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:33:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:06,254 INFO L225 Difference]: With dead ends: 616 [2022-02-11 00:33:06,254 INFO L226 Difference]: Without dead ends: 550 [2022-02-11 00:33:06,254 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:33:06,254 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:06,254 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 96 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:33:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-02-11 00:33:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 422. [2022-02-11 00:33:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0688836104513064) internal successors, (1292), 421 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1292 transitions. [2022-02-11 00:33:06,260 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1292 transitions. Word has length 21 [2022-02-11 00:33:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:06,260 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1292 transitions. [2022-02-11 00:33:06,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1292 transitions. [2022-02-11 00:33:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:06,261 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:06,261 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:06,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:06,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-11 00:33:06,462 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1518990988, now seen corresponding path program 41 times [2022-02-11 00:33:06,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:06,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44129830] [2022-02-11 00:33:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:33:06,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:06,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44129830] [2022-02-11 00:33:06,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44129830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:06,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146195915] [2022-02-11 00:33:06,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:06,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:06,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:06,552 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:06,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 00:33:06,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:06,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 184 [2022-02-11 00:33:06,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 00:33:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:07,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:07,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-02-11 00:33:07,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:07,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 188 [2022-02-11 00:33:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:07,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146195915] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:07,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:07,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-11 00:33:07,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974994370] [2022-02-11 00:33:07,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:07,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:33:07,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:33:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:07,440 INFO L87 Difference]: Start difference. First operand 422 states and 1292 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:08,495 INFO L93 Difference]: Finished difference Result 870 states and 2496 transitions. [2022-02-11 00:33:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:33:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:08,497 INFO L225 Difference]: With dead ends: 870 [2022-02-11 00:33:08,497 INFO L226 Difference]: Without dead ends: 701 [2022-02-11 00:33:08,497 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=1622, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:33:08,498 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 172 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:08,498 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 423 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:33:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-11 00:33:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 406. [2022-02-11 00:33:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.0320987654320986) internal successors, (1228), 405 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1228 transitions. [2022-02-11 00:33:08,504 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1228 transitions. Word has length 21 [2022-02-11 00:33:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:08,504 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1228 transitions. [2022-02-11 00:33:08,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1228 transitions. [2022-02-11 00:33:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:08,504 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:08,505 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:08,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:08,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:08,721 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash 928205818, now seen corresponding path program 42 times [2022-02-11 00:33:08,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:08,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158549540] [2022-02-11 00:33:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:08,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:08,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:08,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158549540] [2022-02-11 00:33:08,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158549540] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:08,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593530154] [2022-02-11 00:33:08,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:08,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:08,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:08,787 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:08,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 00:33:08,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:33:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:09,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:09,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 127 [2022-02-11 00:33:09,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:33:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:09,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:09,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 210 [2022-02-11 00:33:09,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:09,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:33:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:09,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593530154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:09,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:09,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:33:09,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909258454] [2022-02-11 00:33:09,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:09,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:33:09,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:33:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:33:09,607 INFO L87 Difference]: Start difference. First operand 406 states and 1228 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:09,749 INFO L93 Difference]: Finished difference Result 541 states and 1632 transitions. [2022-02-11 00:33:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:33:09,749 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:09,750 INFO L225 Difference]: With dead ends: 541 [2022-02-11 00:33:09,750 INFO L226 Difference]: Without dead ends: 495 [2022-02-11 00:33:09,750 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:09,750 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:09,750 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 332 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-02-11 00:33:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-11 00:33:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 432. [2022-02-11 00:33:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.046403712296984) internal successors, (1313), 431 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1313 transitions. [2022-02-11 00:33:09,755 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1313 transitions. Word has length 21 [2022-02-11 00:33:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:09,755 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1313 transitions. [2022-02-11 00:33:09,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1313 transitions. [2022-02-11 00:33:09,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:09,756 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:09,756 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:09,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:09,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-02-11 00:33:09,956 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash 793518806, now seen corresponding path program 43 times [2022-02-11 00:33:09,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:09,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629112296] [2022-02-11 00:33:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:09,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:10,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:10,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629112296] [2022-02-11 00:33:10,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629112296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:10,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613614441] [2022-02-11 00:33:10,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:10,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:10,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:10,033 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:10,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 00:33:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:10,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:10,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:10,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2022-02-11 00:33:10,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-02-11 00:33:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:10,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:10,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 210 [2022-02-11 00:33:11,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:11,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:33:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:11,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613614441] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:11,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:11,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:33:11,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106156558] [2022-02-11 00:33:11,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:11,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:33:11,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:33:11,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:33:11,048 INFO L87 Difference]: Start difference. First operand 432 states and 1313 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:11,230 INFO L93 Difference]: Finished difference Result 599 states and 1761 transitions. [2022-02-11 00:33:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:33:11,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:11,232 INFO L225 Difference]: With dead ends: 599 [2022-02-11 00:33:11,232 INFO L226 Difference]: Without dead ends: 538 [2022-02-11 00:33:11,232 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:11,232 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:11,232 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 96 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-02-11 00:33:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-11 00:33:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 443. [2022-02-11 00:33:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.0565610859728505) internal successors, (1351), 442 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1351 transitions. [2022-02-11 00:33:11,240 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1351 transitions. Word has length 21 [2022-02-11 00:33:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:11,240 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1351 transitions. [2022-02-11 00:33:11,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1351 transitions. [2022-02-11 00:33:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:11,241 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:11,241 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:11,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:11,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:11,459 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1146658296, now seen corresponding path program 44 times [2022-02-11 00:33:11,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:11,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43146265] [2022-02-11 00:33:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:11,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:11,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43146265] [2022-02-11 00:33:11,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43146265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:11,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702219723] [2022-02-11 00:33:11,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:11,616 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:11,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 00:33:11,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:11,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:11,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:11,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 357 treesize of output 299 [2022-02-11 00:33:11,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:11,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 275 [2022-02-11 00:33:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:12,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:12,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 231 [2022-02-11 00:33:12,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:12,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:33:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:12,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702219723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:12,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:12,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-02-11 00:33:12,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073743647] [2022-02-11 00:33:12,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:12,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:33:12,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:33:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:12,762 INFO L87 Difference]: Start difference. First operand 443 states and 1351 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:13,396 INFO L93 Difference]: Finished difference Result 1033 states and 3018 transitions. [2022-02-11 00:33:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:33:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:13,398 INFO L225 Difference]: With dead ends: 1033 [2022-02-11 00:33:13,398 INFO L226 Difference]: Without dead ends: 959 [2022-02-11 00:33:13,398 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:33:13,398 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:13,399 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 274 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-11 00:33:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 459. [2022-02-11 00:33:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1222707423580784) internal successors, (1430), 458 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1430 transitions. [2022-02-11 00:33:13,408 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1430 transitions. Word has length 21 [2022-02-11 00:33:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:13,408 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1430 transitions. [2022-02-11 00:33:13,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1430 transitions. [2022-02-11 00:33:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:13,409 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:13,409 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:13,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:13,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-02-11 00:33:13,626 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash 155990242, now seen corresponding path program 45 times [2022-02-11 00:33:13,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:13,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040163554] [2022-02-11 00:33:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:13,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:13,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:13,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040163554] [2022-02-11 00:33:13,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040163554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:13,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377342198] [2022-02-11 00:33:13,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:13,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:13,702 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:13,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 00:33:13,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:33:13,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:13,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:13,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 143 [2022-02-11 00:33:13,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:33:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:14,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-02-11 00:33:14,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:14,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-02-11 00:33:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:14,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377342198] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:14,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:14,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:33:14,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868583985] [2022-02-11 00:33:14,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:14,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:33:14,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:14,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:33:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:33:14,361 INFO L87 Difference]: Start difference. First operand 459 states and 1430 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:14,499 INFO L93 Difference]: Finished difference Result 579 states and 1773 transitions. [2022-02-11 00:33:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:33:14,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:14,500 INFO L225 Difference]: With dead ends: 579 [2022-02-11 00:33:14,500 INFO L226 Difference]: Without dead ends: 511 [2022-02-11 00:33:14,500 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:14,500 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:14,501 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 140 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-02-11 00:33:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-11 00:33:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2022-02-11 00:33:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1164835164835165) internal successors, (1418), 455 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1418 transitions. [2022-02-11 00:33:14,506 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1418 transitions. Word has length 21 [2022-02-11 00:33:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:14,506 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1418 transitions. [2022-02-11 00:33:14,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1418 transitions. [2022-02-11 00:33:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:14,507 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:14,507 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:14,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-11 00:33:14,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:14,719 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash 283941334, now seen corresponding path program 46 times [2022-02-11 00:33:14,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:14,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601164304] [2022-02-11 00:33:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:14,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:14,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601164304] [2022-02-11 00:33:14,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601164304] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:14,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856319533] [2022-02-11 00:33:14,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:14,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:14,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:14,809 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:14,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 00:33:14,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:14,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:15,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:15,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 189 [2022-02-11 00:33:15,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:33:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:15,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:15,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 148 [2022-02-11 00:33:15,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:15,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-02-11 00:33:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:15,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856319533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:15,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:15,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-11 00:33:15,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877588481] [2022-02-11 00:33:15,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:15,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:33:15,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:33:15,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:33:15,541 INFO L87 Difference]: Start difference. First operand 456 states and 1418 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:15,697 INFO L93 Difference]: Finished difference Result 587 states and 1803 transitions. [2022-02-11 00:33:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:33:15,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:15,698 INFO L225 Difference]: With dead ends: 587 [2022-02-11 00:33:15,698 INFO L226 Difference]: Without dead ends: 551 [2022-02-11 00:33:15,698 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:15,699 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:15,699 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 109 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 327 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-02-11 00:33:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-11 00:33:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 454. [2022-02-11 00:33:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1147902869757176) internal successors, (1411), 453 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1411 transitions. [2022-02-11 00:33:15,704 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1411 transitions. Word has length 21 [2022-02-11 00:33:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:15,704 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1411 transitions. [2022-02-11 00:33:15,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1411 transitions. [2022-02-11 00:33:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:33:15,705 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:15,705 INFO L515 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:15,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:15,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:15,918 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1340912374, now seen corresponding path program 47 times [2022-02-11 00:33:15,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:15,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234493263] [2022-02-11 00:33:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:15,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:15,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:15,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234493263] [2022-02-11 00:33:15,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234493263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:15,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706749944] [2022-02-11 00:33:15,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:15,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:15,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:15,981 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:15,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 00:33:16,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:16,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 00:33:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:16,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-11 00:33:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:16,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:16,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 254 [2022-02-11 00:33:16,519 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:16,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:33:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:16,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706749944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:16,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:16,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-11 00:33:16,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653185128] [2022-02-11 00:33:16,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:33:16,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:33:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:33:16,522 INFO L87 Difference]: Start difference. First operand 454 states and 1411 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:17,103 INFO L93 Difference]: Finished difference Result 836 states and 2549 transitions. [2022-02-11 00:33:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:33:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:33:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:17,104 INFO L225 Difference]: With dead ends: 836 [2022-02-11 00:33:17,105 INFO L226 Difference]: Without dead ends: 747 [2022-02-11 00:33:17,105 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:33:17,105 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 131 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:17,106 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 235 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-11 00:33:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 428. [2022-02-11 00:33:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.070257611241218) internal successors, (1311), 427 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1311 transitions. [2022-02-11 00:33:17,112 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1311 transitions. Word has length 21 [2022-02-11 00:33:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:17,112 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1311 transitions. [2022-02-11 00:33:17,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1311 transitions. [2022-02-11 00:33:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:17,113 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:17,113 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:17,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:17,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-11 00:33:17,314 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:17,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash -520581084, now seen corresponding path program 48 times [2022-02-11 00:33:17,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:17,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127385932] [2022-02-11 00:33:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:17,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:17,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127385932] [2022-02-11 00:33:17,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127385932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:17,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351264208] [2022-02-11 00:33:17,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:17,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:17,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:17,406 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:17,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 00:33:17,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:33:17,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:17,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:17,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:17,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:33:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:17,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:17,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:17,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:33:17,824 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:17,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:33:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:17,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351264208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:17,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:17,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-02-11 00:33:17,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144210306] [2022-02-11 00:33:17,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:17,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:33:17,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:33:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:17,828 INFO L87 Difference]: Start difference. First operand 428 states and 1311 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:18,698 INFO L93 Difference]: Finished difference Result 846 states and 2421 transitions. [2022-02-11 00:33:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:33:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:18,700 INFO L225 Difference]: With dead ends: 846 [2022-02-11 00:33:18,700 INFO L226 Difference]: Without dead ends: 776 [2022-02-11 00:33:18,700 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=1915, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:33:18,707 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:18,707 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 409 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:33:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-02-11 00:33:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 413. [2022-02-11 00:33:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0436893203883497) internal successors, (1254), 412 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1254 transitions. [2022-02-11 00:33:18,717 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1254 transitions. Word has length 22 [2022-02-11 00:33:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:18,717 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1254 transitions. [2022-02-11 00:33:18,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1254 transitions. [2022-02-11 00:33:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:18,718 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:18,718 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:18,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:18,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-11 00:33:18,922 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash -780260828, now seen corresponding path program 49 times [2022-02-11 00:33:18,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:18,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342735283] [2022-02-11 00:33:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:18,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:18,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342735283] [2022-02-11 00:33:18,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342735283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:18,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782211060] [2022-02-11 00:33:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:18,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:18,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:18,986 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:18,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 00:33:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:19,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:33:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:19,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:19,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:19,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:33:19,334 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:19,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:33:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:19,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782211060] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:19,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:19,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-02-11 00:33:19,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829100816] [2022-02-11 00:33:19,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:19,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:33:19,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:33:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:19,337 INFO L87 Difference]: Start difference. First operand 413 states and 1254 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:20,166 INFO L93 Difference]: Finished difference Result 851 states and 2463 transitions. [2022-02-11 00:33:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:33:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:20,167 INFO L225 Difference]: With dead ends: 851 [2022-02-11 00:33:20,167 INFO L226 Difference]: Without dead ends: 787 [2022-02-11 00:33:20,168 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:33:20,168 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 132 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:20,168 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 474 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:33:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-02-11 00:33:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 385. [2022-02-11 00:33:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0026041666666665) internal successors, (1153), 384 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1153 transitions. [2022-02-11 00:33:20,174 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1153 transitions. Word has length 22 [2022-02-11 00:33:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:20,174 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1153 transitions. [2022-02-11 00:33:20,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1153 transitions. [2022-02-11 00:33:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:20,175 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:20,175 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:20,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:20,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-11 00:33:20,385 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:20,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1638622410, now seen corresponding path program 50 times [2022-02-11 00:33:20,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:20,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626926307] [2022-02-11 00:33:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:20,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:20,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:20,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626926307] [2022-02-11 00:33:20,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626926307] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:20,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871960887] [2022-02-11 00:33:20,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:20,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:20,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:20,460 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:20,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 00:33:20,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:20,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:20,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:33:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:20,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:20,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:33:20,808 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:20,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:33:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:20,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871960887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:20,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:20,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-02-11 00:33:20,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122239067] [2022-02-11 00:33:20,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:20,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:33:20,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:33:20,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:20,812 INFO L87 Difference]: Start difference. First operand 385 states and 1153 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:22,078 INFO L93 Difference]: Finished difference Result 900 states and 2592 transitions. [2022-02-11 00:33:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:33:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:22,080 INFO L225 Difference]: With dead ends: 900 [2022-02-11 00:33:22,080 INFO L226 Difference]: Without dead ends: 830 [2022-02-11 00:33:22,080 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=2218, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:33:22,080 INFO L934 BasicCegarLoop]: 54 mSDtfsCounter, 202 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:22,080 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 584 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:33:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-02-11 00:33:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 396. [2022-02-11 00:33:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.9949367088607595) internal successors, (1183), 395 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1183 transitions. [2022-02-11 00:33:22,086 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1183 transitions. Word has length 22 [2022-02-11 00:33:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:22,087 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1183 transitions. [2022-02-11 00:33:22,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1183 transitions. [2022-02-11 00:33:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:22,087 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:22,087 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:22,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:22,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-11 00:33:22,288 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1991761900, now seen corresponding path program 51 times [2022-02-11 00:33:22,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:22,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095843426] [2022-02-11 00:33:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:22,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:22,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095843426] [2022-02-11 00:33:22,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095843426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:22,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082804999] [2022-02-11 00:33:22,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:22,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:22,361 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:22,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 00:33:22,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:33:22,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:22,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:33:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:22,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:22,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:22,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:33:22,764 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:22,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:33:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:22,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082804999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:22,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:22,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-02-11 00:33:22,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104876125] [2022-02-11 00:33:22,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:22,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:33:22,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:33:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:33:22,767 INFO L87 Difference]: Start difference. First operand 396 states and 1183 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:23,652 INFO L93 Difference]: Finished difference Result 894 states and 2573 transitions. [2022-02-11 00:33:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:33:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:23,654 INFO L225 Difference]: With dead ends: 894 [2022-02-11 00:33:23,654 INFO L226 Difference]: Without dead ends: 848 [2022-02-11 00:33:23,655 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=511, Invalid=2351, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:33:23,655 INFO L934 BasicCegarLoop]: 52 mSDtfsCounter, 167 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:23,655 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 644 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:33:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-02-11 00:33:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 378. [2022-02-11 00:33:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.973474801061008) internal successors, (1121), 377 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1121 transitions. [2022-02-11 00:33:23,663 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1121 transitions. Word has length 22 [2022-02-11 00:33:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:23,663 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1121 transitions. [2022-02-11 00:33:23,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1121 transitions. [2022-02-11 00:33:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:23,664 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:23,664 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:23,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:23,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 00:33:23,885 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1817911674, now seen corresponding path program 52 times [2022-02-11 00:33:23,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:23,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948488284] [2022-02-11 00:33:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:23,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:23,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948488284] [2022-02-11 00:33:23,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948488284] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:23,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380367065] [2022-02-11 00:33:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:23,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:23,921 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:23,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 00:33:23,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:23,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:24,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:24,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:24,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:33:24,248 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:24,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:33:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:24,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380367065] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:24,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:24,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-02-11 00:33:24,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332179951] [2022-02-11 00:33:24,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:24,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:33:24,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:33:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:24,251 INFO L87 Difference]: Start difference. First operand 378 states and 1121 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:25,283 INFO L93 Difference]: Finished difference Result 726 states and 2091 transitions. [2022-02-11 00:33:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:33:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:25,284 INFO L225 Difference]: With dead ends: 726 [2022-02-11 00:33:25,284 INFO L226 Difference]: Without dead ends: 680 [2022-02-11 00:33:25,285 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:33:25,285 INFO L934 BasicCegarLoop]: 60 mSDtfsCounter, 153 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:25,285 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 591 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:33:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-11 00:33:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 311. [2022-02-11 00:33:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9161290322580644) internal successors, (904), 310 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 904 transitions. [2022-02-11 00:33:25,290 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 904 transitions. Word has length 22 [2022-02-11 00:33:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:25,290 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 904 transitions. [2022-02-11 00:33:25,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 904 transitions. [2022-02-11 00:33:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:25,291 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:25,291 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:25,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:25,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:25,507 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1282730021, now seen corresponding path program 53 times [2022-02-11 00:33:25,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:25,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688785747] [2022-02-11 00:33:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:33:25,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:25,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688785747] [2022-02-11 00:33:25,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688785747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:25,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382721987] [2022-02-11 00:33:25,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:25,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:25,606 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:25,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 00:33:25,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:33:25,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:25,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:25,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:25,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:33:26,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:26,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:33:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:26,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:26,224 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:26,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:26,309 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:33:26,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-11 00:33:26,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-02-11 00:33:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:26,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382721987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:26,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:26,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-02-11 00:33:26,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778795831] [2022-02-11 00:33:26,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:26,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:26,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:26,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:26,375 INFO L87 Difference]: Start difference. First operand 311 states and 904 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:27,223 INFO L93 Difference]: Finished difference Result 842 states and 2401 transitions. [2022-02-11 00:33:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:33:27,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:27,225 INFO L225 Difference]: With dead ends: 842 [2022-02-11 00:33:27,225 INFO L226 Difference]: Without dead ends: 724 [2022-02-11 00:33:27,225 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:33:27,225 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 235 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:27,225 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 241 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-11 00:33:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 338. [2022-02-11 00:33:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0089020771513355) internal successors, (1014), 337 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1014 transitions. [2022-02-11 00:33:27,230 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1014 transitions. Word has length 22 [2022-02-11 00:33:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:27,230 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1014 transitions. [2022-02-11 00:33:27,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1014 transitions. [2022-02-11 00:33:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:27,231 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:27,231 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:27,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:27,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:27,432 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash 443034195, now seen corresponding path program 54 times [2022-02-11 00:33:27,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:27,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099504570] [2022-02-11 00:33:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:27,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:27,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:27,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099504570] [2022-02-11 00:33:27,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099504570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:27,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657330808] [2022-02-11 00:33:27,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:27,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:27,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:27,546 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:27,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 00:33:27,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:33:27,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:27,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:33:27,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-11 00:33:27,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-02-11 00:33:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:27,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:27,998 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:27,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:28,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:28,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:28,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:28,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:28,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657330808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:28,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:28,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-02-11 00:33:28,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366525032] [2022-02-11 00:33:28,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:28,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:33:28,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:33:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:33:28,194 INFO L87 Difference]: Start difference. First operand 338 states and 1014 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:30,049 INFO L93 Difference]: Finished difference Result 906 states and 2539 transitions. [2022-02-11 00:33:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:33:30,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:30,050 INFO L225 Difference]: With dead ends: 906 [2022-02-11 00:33:30,050 INFO L226 Difference]: Without dead ends: 744 [2022-02-11 00:33:30,051 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:33:30,051 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 307 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:30,051 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 236 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:33:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-11 00:33:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 331. [2022-02-11 00:33:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2022-02-11 00:33:30,056 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2022-02-11 00:33:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:30,056 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2022-02-11 00:33:30,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2022-02-11 00:33:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:30,057 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:30,057 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:30,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:30,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:30,258 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1922553573, now seen corresponding path program 55 times [2022-02-11 00:33:30,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:30,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595126760] [2022-02-11 00:33:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:30,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:30,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595126760] [2022-02-11 00:33:30,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595126760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:30,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374901535] [2022-02-11 00:33:30,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:30,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:30,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:30,358 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:30,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 00:33:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:30,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:30,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:30,703 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:30,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:30,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:30,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:30,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:30,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:30,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374901535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:30,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:30,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-02-11 00:33:30,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416721690] [2022-02-11 00:33:30,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:30,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:33:30,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:33:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:33:30,831 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:31,393 INFO L93 Difference]: Finished difference Result 715 states and 2040 transitions. [2022-02-11 00:33:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:33:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:31,394 INFO L225 Difference]: With dead ends: 715 [2022-02-11 00:33:31,394 INFO L226 Difference]: Without dead ends: 575 [2022-02-11 00:33:31,395 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:33:31,395 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:31,395 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 187 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:33:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-11 00:33:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 324. [2022-02-11 00:33:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.959752321981424) internal successors, (956), 323 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 956 transitions. [2022-02-11 00:33:31,400 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 956 transitions. Word has length 22 [2022-02-11 00:33:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:31,400 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 956 transitions. [2022-02-11 00:33:31,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 956 transitions. [2022-02-11 00:33:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:31,401 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:31,401 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:31,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:31,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:31,617 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1403862611, now seen corresponding path program 56 times [2022-02-11 00:33:31,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:31,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123300483] [2022-02-11 00:33:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:31,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:31,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123300483] [2022-02-11 00:33:31,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123300483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:31,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157623891] [2022-02-11 00:33:31,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:31,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:31,707 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:31,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 00:33:31,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:31,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:31,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:32,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:32,245 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:32,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:32,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:32,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:32,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:32,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:32,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157623891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:32,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:32,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-02-11 00:33:32,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354931473] [2022-02-11 00:33:32,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:32,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:33:32,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:33:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:33:32,477 INFO L87 Difference]: Start difference. First operand 324 states and 956 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:33,531 INFO L93 Difference]: Finished difference Result 950 states and 2685 transitions. [2022-02-11 00:33:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:33:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:33,532 INFO L225 Difference]: With dead ends: 950 [2022-02-11 00:33:33,532 INFO L226 Difference]: Without dead ends: 698 [2022-02-11 00:33:33,532 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=1605, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:33:33,534 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 256 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:33,534 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 331 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:33:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-11 00:33:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 324. [2022-02-11 00:33:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.931888544891641) internal successors, (947), 323 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 947 transitions. [2022-02-11 00:33:33,540 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 947 transitions. Word has length 22 [2022-02-11 00:33:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:33,540 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 947 transitions. [2022-02-11 00:33:33,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 947 transitions. [2022-02-11 00:33:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:33,540 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:33,541 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:33,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:33,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:33,757 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:33,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 827673381, now seen corresponding path program 57 times [2022-02-11 00:33:33,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:33,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590520600] [2022-02-11 00:33:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:33,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:33,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:33,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590520600] [2022-02-11 00:33:33,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590520600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:33,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461125893] [2022-02-11 00:33:33,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:33,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:33,916 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:33,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 00:33:34,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:33:34,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:33:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:34,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 247 [2022-02-11 00:33:34,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:34,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:33:34,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:33:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:33:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:34,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:33:34,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 244 [2022-02-11 00:33:34,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:34,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 221 [2022-02-11 00:33:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:33:34,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461125893] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:34,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:34,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-02-11 00:33:34,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81263620] [2022-02-11 00:33:34,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:34,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:33:34,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:33:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:33:34,976 INFO L87 Difference]: Start difference. First operand 324 states and 947 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:35,429 INFO L93 Difference]: Finished difference Result 924 states and 2663 transitions. [2022-02-11 00:33:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:33:35,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:35,431 INFO L225 Difference]: With dead ends: 924 [2022-02-11 00:33:35,431 INFO L226 Difference]: Without dead ends: 806 [2022-02-11 00:33:35,431 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:33:35,431 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 236 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:35,431 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 174 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 407 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-02-11 00:33:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-02-11 00:33:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 362. [2022-02-11 00:33:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0304709141274238) internal successors, (1094), 361 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1094 transitions. [2022-02-11 00:33:35,439 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1094 transitions. Word has length 22 [2022-02-11 00:33:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:35,439 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1094 transitions. [2022-02-11 00:33:35,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1094 transitions. [2022-02-11 00:33:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:35,440 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:35,440 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:35,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:35,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-11 00:33:35,661 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash -12022445, now seen corresponding path program 58 times [2022-02-11 00:33:35,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:35,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29635933] [2022-02-11 00:33:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:35,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:35,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:35,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29635933] [2022-02-11 00:33:35,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29635933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:35,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601496890] [2022-02-11 00:33:35,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:35,756 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:35,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 00:33:35,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:35,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:35,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:35,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:36,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:36,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:33:36,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:33:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:36,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:36,259 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:36,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:36,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:36,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:36,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:36,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:36,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601496890] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:36,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:36,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-02-11 00:33:36,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497499899] [2022-02-11 00:33:36,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:36,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:33:36,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:33:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:33:36,387 INFO L87 Difference]: Start difference. First operand 362 states and 1094 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:36,802 INFO L93 Difference]: Finished difference Result 692 states and 1988 transitions. [2022-02-11 00:33:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:33:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:36,803 INFO L225 Difference]: With dead ends: 692 [2022-02-11 00:33:36,803 INFO L226 Difference]: Without dead ends: 459 [2022-02-11 00:33:36,803 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:33:36,803 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 168 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:36,804 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 233 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 473 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-02-11 00:33:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-02-11 00:33:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 363. [2022-02-11 00:33:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.022099447513812) internal successors, (1094), 362 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1094 transitions. [2022-02-11 00:33:36,808 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1094 transitions. Word has length 22 [2022-02-11 00:33:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:36,808 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1094 transitions. [2022-02-11 00:33:36,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1094 transitions. [2022-02-11 00:33:36,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:36,809 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:36,809 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:36,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:37,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-02-11 00:33:37,026 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1508687481, now seen corresponding path program 59 times [2022-02-11 00:33:37,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:37,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493583689] [2022-02-11 00:33:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:33:37,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:37,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493583689] [2022-02-11 00:33:37,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493583689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:37,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754996337] [2022-02-11 00:33:37,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:37,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:37,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:37,111 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:37,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 00:33:37,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:33:37,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:37,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:37,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:33:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:37,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:37,484 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:37,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:37,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:37,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:33:37,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:37,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-02-11 00:33:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:37,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754996337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:37,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:37,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-11 00:33:37,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652333730] [2022-02-11 00:33:37,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:37,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:33:37,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:33:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:33:37,615 INFO L87 Difference]: Start difference. First operand 363 states and 1094 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:38,023 INFO L93 Difference]: Finished difference Result 787 states and 2270 transitions. [2022-02-11 00:33:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:33:38,024 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:38,025 INFO L225 Difference]: With dead ends: 787 [2022-02-11 00:33:38,025 INFO L226 Difference]: Without dead ends: 665 [2022-02-11 00:33:38,032 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:33:38,032 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 217 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:38,032 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 280 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:33:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-11 00:33:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 354. [2022-02-11 00:33:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.997167138810198) internal successors, (1058), 353 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2022-02-11 00:33:38,037 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 22 [2022-02-11 00:33:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:38,038 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2022-02-11 00:33:38,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2022-02-11 00:33:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:38,038 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:38,038 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:38,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:38,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:38,254 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash 246772879, now seen corresponding path program 60 times [2022-02-11 00:33:38,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:38,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254425877] [2022-02-11 00:33:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:38,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:38,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254425877] [2022-02-11 00:33:38,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254425877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:38,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568782535] [2022-02-11 00:33:38,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:38,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:38,403 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:38,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 00:33:38,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:33:38,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:38,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:38,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:38,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:33:38,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:38,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:33:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:38,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:39,035 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:39,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:39,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:39,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:39,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:39,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:39,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568782535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:39,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:39,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-11 00:33:39,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000639681] [2022-02-11 00:33:39,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:39,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:33:39,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:33:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:33:39,162 INFO L87 Difference]: Start difference. First operand 354 states and 1058 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:39,472 INFO L93 Difference]: Finished difference Result 710 states and 2011 transitions. [2022-02-11 00:33:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:33:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:39,474 INFO L225 Difference]: With dead ends: 710 [2022-02-11 00:33:39,474 INFO L226 Difference]: Without dead ends: 661 [2022-02-11 00:33:39,474 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:33:39,475 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 205 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:39,475 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 238 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 408 Invalid, 0 Unknown, 189 Unchecked, 0.1s Time] [2022-02-11 00:33:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-02-11 00:33:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 356. [2022-02-11 00:33:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.0028169014084507) internal successors, (1066), 355 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1066 transitions. [2022-02-11 00:33:39,480 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1066 transitions. Word has length 22 [2022-02-11 00:33:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:39,480 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1066 transitions. [2022-02-11 00:33:39,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1066 transitions. [2022-02-11 00:33:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:39,481 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:39,481 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:39,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:39,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:39,697 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash 589022373, now seen corresponding path program 61 times [2022-02-11 00:33:39,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:39,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949716143] [2022-02-11 00:33:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:39,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:39,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:39,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949716143] [2022-02-11 00:33:39,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949716143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:39,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091389921] [2022-02-11 00:33:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:39,775 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:39,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 00:33:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:40,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:40,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:33:40,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:33:40,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:40,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:33:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:40,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:40,293 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:40,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:40,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:40,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:40,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:40,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:40,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091389921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:40,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:40,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-02-11 00:33:40,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500769308] [2022-02-11 00:33:40,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:33:40,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:40,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:33:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:33:40,520 INFO L87 Difference]: Start difference. First operand 356 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:41,063 INFO L93 Difference]: Finished difference Result 592 states and 1705 transitions. [2022-02-11 00:33:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:33:41,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:41,064 INFO L225 Difference]: With dead ends: 592 [2022-02-11 00:33:41,064 INFO L226 Difference]: Without dead ends: 460 [2022-02-11 00:33:41,064 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:33:41,064 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:41,064 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 190 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 505 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-02-11 00:33:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-02-11 00:33:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 355. [2022-02-11 00:33:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0028248587570623) internal successors, (1063), 354 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1063 transitions. [2022-02-11 00:33:41,069 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1063 transitions. Word has length 22 [2022-02-11 00:33:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:41,069 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1063 transitions. [2022-02-11 00:33:41,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1063 transitions. [2022-02-11 00:33:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:41,069 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:41,070 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:41,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-11 00:33:41,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-11 00:33:41,271 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1722390457, now seen corresponding path program 62 times [2022-02-11 00:33:41,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:41,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749871048] [2022-02-11 00:33:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:41,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:41,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749871048] [2022-02-11 00:33:41,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749871048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:41,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320095094] [2022-02-11 00:33:41,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:41,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:41,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:41,421 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:41,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 00:33:41,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:41,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:41,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:41,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:41,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:41,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:41,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:41,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:33:41,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:33:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:41,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:41,982 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:41,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:42,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:42,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:42,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:42,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:42,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320095094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:42,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:42,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:33:42,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947938752] [2022-02-11 00:33:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:42,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:42,129 INFO L87 Difference]: Start difference. First operand 355 states and 1063 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:42,554 INFO L93 Difference]: Finished difference Result 762 states and 2163 transitions. [2022-02-11 00:33:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:33:42,554 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:42,556 INFO L225 Difference]: With dead ends: 762 [2022-02-11 00:33:42,556 INFO L226 Difference]: Without dead ends: 713 [2022-02-11 00:33:42,556 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:33:42,556 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:42,556 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 225 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 478 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-02-11 00:33:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-02-11 00:33:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 358. [2022-02-11 00:33:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0168067226890756) internal successors, (1077), 357 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1077 transitions. [2022-02-11 00:33:42,563 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1077 transitions. Word has length 22 [2022-02-11 00:33:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:42,563 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1077 transitions. [2022-02-11 00:33:42,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1077 transitions. [2022-02-11 00:33:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:42,564 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:42,564 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:42,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:42,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:42,778 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2064639951, now seen corresponding path program 63 times [2022-02-11 00:33:42,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:42,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126322717] [2022-02-11 00:33:42,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:42,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:42,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:42,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126322717] [2022-02-11 00:33:42,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126322717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:42,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948243398] [2022-02-11 00:33:42,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:42,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:42,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:42,932 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:42,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 00:33:43,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:33:43,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:43,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:43,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:43,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:43,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:43,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:43,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:33:43,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:33:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:43,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:43,448 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:43,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:43,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:43,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:43,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:43,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:43,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948243398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:43,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:43,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:33:43,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030150071] [2022-02-11 00:33:43,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:33:43,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:33:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:33:43,589 INFO L87 Difference]: Start difference. First operand 358 states and 1077 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:44,103 INFO L93 Difference]: Finished difference Result 738 states and 2083 transitions. [2022-02-11 00:33:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:33:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:44,104 INFO L225 Difference]: With dead ends: 738 [2022-02-11 00:33:44,104 INFO L226 Difference]: Without dead ends: 553 [2022-02-11 00:33:44,104 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:33:44,104 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:44,104 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 274 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 606 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-02-11 00:33:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-11 00:33:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 350. [2022-02-11 00:33:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.988538681948424) internal successors, (1043), 349 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1043 transitions. [2022-02-11 00:33:44,109 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1043 transitions. Word has length 22 [2022-02-11 00:33:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:44,121 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1043 transitions. [2022-02-11 00:33:44,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1043 transitions. [2022-02-11 00:33:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:44,122 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:44,122 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:44,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:44,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:44,338 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash 661612367, now seen corresponding path program 64 times [2022-02-11 00:33:44,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:44,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510983364] [2022-02-11 00:33:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:44,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:44,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:44,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510983364] [2022-02-11 00:33:44,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510983364] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:44,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215460653] [2022-02-11 00:33:44,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:44,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:44,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:44,426 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:44,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 00:33:44,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:44,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:44,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:44,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:33:44,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:44,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:33:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:44,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:44,895 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:44,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:44,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:44,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:44,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:44,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:45,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215460653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:45,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:45,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-02-11 00:33:45,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155467014] [2022-02-11 00:33:45,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:45,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:33:45,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:33:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:33:45,059 INFO L87 Difference]: Start difference. First operand 350 states and 1043 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:45,287 INFO L93 Difference]: Finished difference Result 481 states and 1428 transitions. [2022-02-11 00:33:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:33:45,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:45,288 INFO L225 Difference]: With dead ends: 481 [2022-02-11 00:33:45,288 INFO L226 Difference]: Without dead ends: 472 [2022-02-11 00:33:45,288 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:33:45,288 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:45,288 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 135 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 330 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-02-11 00:33:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-11 00:33:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2022-02-11 00:33:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9827586206896552) internal successors, (1038), 348 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1038 transitions. [2022-02-11 00:33:45,292 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1038 transitions. Word has length 22 [2022-02-11 00:33:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:45,293 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1038 transitions. [2022-02-11 00:33:45,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1038 transitions. [2022-02-11 00:33:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:45,295 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:45,295 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:45,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:45,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-02-11 00:33:45,507 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1028330537, now seen corresponding path program 65 times [2022-02-11 00:33:45,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:45,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498077727] [2022-02-11 00:33:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:45,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:45,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498077727] [2022-02-11 00:33:45,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498077727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:45,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165533908] [2022-02-11 00:33:45,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:45,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:45,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:45,671 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:45,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 00:33:45,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:33:45,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:45,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:45,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:46,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:33:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:46,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:46,232 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:46,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:46,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:46,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:33:46,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:46,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-02-11 00:33:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:46,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165533908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:46,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:46,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-11 00:33:46,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094735557] [2022-02-11 00:33:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:46,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:33:46,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:33:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:33:46,380 INFO L87 Difference]: Start difference. First operand 349 states and 1038 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:46,965 INFO L93 Difference]: Finished difference Result 663 states and 1878 transitions. [2022-02-11 00:33:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:33:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:46,966 INFO L225 Difference]: With dead ends: 663 [2022-02-11 00:33:46,966 INFO L226 Difference]: Without dead ends: 657 [2022-02-11 00:33:46,966 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:33:46,967 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:46,967 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 234 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:33:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-02-11 00:33:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 341. [2022-02-11 00:33:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.961764705882353) internal successors, (1007), 340 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1007 transitions. [2022-02-11 00:33:46,972 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1007 transitions. Word has length 22 [2022-02-11 00:33:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:46,972 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1007 transitions. [2022-02-11 00:33:46,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1007 transitions. [2022-02-11 00:33:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:46,973 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:46,973 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:46,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:47,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:47,183 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1467496933, now seen corresponding path program 66 times [2022-02-11 00:33:47,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:47,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610608665] [2022-02-11 00:33:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:47,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:47,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:47,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610608665] [2022-02-11 00:33:47,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610608665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:47,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872862021] [2022-02-11 00:33:47,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:47,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:47,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:47,343 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:47,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 00:33:47,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:33:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:47,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:47,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:47,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:47,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:47,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-02-11 00:33:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:47,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:47,954 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:47,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:48,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:48,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:48,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:48,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:48,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872862021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:48,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:48,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:33:48,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199914898] [2022-02-11 00:33:48,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:48,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:48,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:48,104 INFO L87 Difference]: Start difference. First operand 341 states and 1007 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:48,404 INFO L93 Difference]: Finished difference Result 587 states and 1657 transitions. [2022-02-11 00:33:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:33:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:48,405 INFO L225 Difference]: With dead ends: 587 [2022-02-11 00:33:48,405 INFO L226 Difference]: Without dead ends: 529 [2022-02-11 00:33:48,405 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:33:48,405 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:48,405 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 212 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 322 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-02-11 00:33:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-02-11 00:33:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 393. [2022-02-11 00:33:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.9770408163265305) internal successors, (1167), 392 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1167 transitions. [2022-02-11 00:33:48,411 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1167 transitions. Word has length 22 [2022-02-11 00:33:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:48,411 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1167 transitions. [2022-02-11 00:33:48,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1167 transitions. [2022-02-11 00:33:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:48,412 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:48,412 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:48,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:48,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:48,627 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1748935899, now seen corresponding path program 67 times [2022-02-11 00:33:48,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:48,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501901789] [2022-02-11 00:33:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:48,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:48,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501901789] [2022-02-11 00:33:48,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501901789] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:48,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403423771] [2022-02-11 00:33:48,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:48,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:48,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:48,778 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:48,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 00:33:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:49,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:49,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:49,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:49,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-02-11 00:33:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:49,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:49,308 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:49,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:49,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:49,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:49,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:49,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:49,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403423771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:49,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:49,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:33:49,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559314634] [2022-02-11 00:33:49,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:49,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:49,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:49,450 INFO L87 Difference]: Start difference. First operand 393 states and 1167 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:49,786 INFO L93 Difference]: Finished difference Result 647 states and 1846 transitions. [2022-02-11 00:33:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:33:49,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:49,787 INFO L225 Difference]: With dead ends: 647 [2022-02-11 00:33:49,787 INFO L226 Difference]: Without dead ends: 604 [2022-02-11 00:33:49,787 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:33:49,787 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:49,787 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 211 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-02-11 00:33:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-02-11 00:33:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 420. [2022-02-11 00:33:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.990453460620525) internal successors, (1253), 419 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1253 transitions. [2022-02-11 00:33:49,795 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1253 transitions. Word has length 22 [2022-02-11 00:33:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:49,795 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1253 transitions. [2022-02-11 00:33:49,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1253 transitions. [2022-02-11 00:33:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:49,798 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:49,798 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:49,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:50,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-02-11 00:33:50,011 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1395243365, now seen corresponding path program 68 times [2022-02-11 00:33:50,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:50,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250223339] [2022-02-11 00:33:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:50,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:50,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250223339] [2022-02-11 00:33:50,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250223339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:50,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376647243] [2022-02-11 00:33:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:50,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:50,160 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:50,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 00:33:50,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:50,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:50,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:50,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:50,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:50,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:50,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-02-11 00:33:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:50,685 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:50,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:50,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:50,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:50,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:50,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:50,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376647243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:50,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:50,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:33:50,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630693085] [2022-02-11 00:33:50,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:50,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:50,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:50,841 INFO L87 Difference]: Start difference. First operand 420 states and 1253 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:51,088 INFO L93 Difference]: Finished difference Result 580 states and 1686 transitions. [2022-02-11 00:33:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:33:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:51,089 INFO L225 Difference]: With dead ends: 580 [2022-02-11 00:33:51,089 INFO L226 Difference]: Without dead ends: 442 [2022-02-11 00:33:51,089 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:33:51,089 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:51,089 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 182 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 403 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-02-11 00:33:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-02-11 00:33:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 380. [2022-02-11 00:33:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9577836411609497) internal successors, (1121), 379 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1121 transitions. [2022-02-11 00:33:51,094 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1121 transitions. Word has length 22 [2022-02-11 00:33:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:51,094 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1121 transitions. [2022-02-11 00:33:51,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1121 transitions. [2022-02-11 00:33:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:51,095 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:51,095 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:51,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:51,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:51,311 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1556958159, now seen corresponding path program 69 times [2022-02-11 00:33:51,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:51,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240318412] [2022-02-11 00:33:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:51,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:51,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240318412] [2022-02-11 00:33:51,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240318412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:51,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155206603] [2022-02-11 00:33:51,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:51,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:51,451 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:51,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 00:33:51,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:33:51,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:51,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:51,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:51,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:51,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:33:52,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:52,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:33:52,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:52,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:33:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:52,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:52,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:52,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:52,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:52,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-02-11 00:33:52,392 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:52,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:52,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155206603] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:52,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:52,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:33:52,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352365405] [2022-02-11 00:33:52,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:52,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:52,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:52,405 INFO L87 Difference]: Start difference. First operand 380 states and 1121 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:52,621 INFO L93 Difference]: Finished difference Result 520 states and 1555 transitions. [2022-02-11 00:33:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:33:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:52,622 INFO L225 Difference]: With dead ends: 520 [2022-02-11 00:33:52,622 INFO L226 Difference]: Without dead ends: 520 [2022-02-11 00:33:52,622 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:33:52,623 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:52,623 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 155 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 290 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-02-11 00:33:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-11 00:33:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 392. [2022-02-11 00:33:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.9846547314578005) internal successors, (1167), 391 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1167 transitions. [2022-02-11 00:33:52,628 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1167 transitions. Word has length 22 [2022-02-11 00:33:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:52,628 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1167 transitions. [2022-02-11 00:33:52,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1167 transitions. [2022-02-11 00:33:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:52,628 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:52,628 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:52,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:52,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:52,845 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:52,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1243406173, now seen corresponding path program 70 times [2022-02-11 00:33:52,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:52,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334213139] [2022-02-11 00:33:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:52,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:52,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:52,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334213139] [2022-02-11 00:33:52,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334213139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:52,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078230167] [2022-02-11 00:33:52,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:33:52,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:52,924 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:52,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 00:33:53,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:33:53,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:53,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:53,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:33:53,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:53,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:33:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:53,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:53,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:53,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:53,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:53,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-02-11 00:33:53,581 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:53,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:53,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078230167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:53,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:53,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-02-11 00:33:53,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814131677] [2022-02-11 00:33:53,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:53,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:33:53,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:33:53,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:33:53,598 INFO L87 Difference]: Start difference. First operand 392 states and 1167 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:53,782 INFO L93 Difference]: Finished difference Result 661 states and 2002 transitions. [2022-02-11 00:33:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:33:53,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:53,783 INFO L225 Difference]: With dead ends: 661 [2022-02-11 00:33:53,783 INFO L226 Difference]: Without dead ends: 584 [2022-02-11 00:33:53,784 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:33:53,784 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:53,784 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 218 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 382 Invalid, 0 Unknown, 252 Unchecked, 0.1s Time] [2022-02-11 00:33:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-11 00:33:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 437. [2022-02-11 00:33:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.0779816513761467) internal successors, (1342), 436 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1342 transitions. [2022-02-11 00:33:53,791 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1342 transitions. Word has length 22 [2022-02-11 00:33:53,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:53,792 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1342 transitions. [2022-02-11 00:33:53,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:53,792 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1342 transitions. [2022-02-11 00:33:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:53,793 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:53,793 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:53,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:54,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:54,016 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash -769451599, now seen corresponding path program 71 times [2022-02-11 00:33:54,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:54,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230944932] [2022-02-11 00:33:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:33:54,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:54,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230944932] [2022-02-11 00:33:54,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230944932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:54,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306338411] [2022-02-11 00:33:54,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:33:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:54,095 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:54,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 00:33:54,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:54,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:33:54,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:33:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:54,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:54,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:33:54,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:54,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:33:54,542 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:54,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:54,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306338411] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:54,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:54,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:33:54,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767064035] [2022-02-11 00:33:54,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:54,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:33:54,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:54,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:33:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:33:54,550 INFO L87 Difference]: Start difference. First operand 437 states and 1342 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:54,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:54,978 INFO L93 Difference]: Finished difference Result 876 states and 2518 transitions. [2022-02-11 00:33:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:33:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:54,980 INFO L225 Difference]: With dead ends: 876 [2022-02-11 00:33:54,980 INFO L226 Difference]: Without dead ends: 794 [2022-02-11 00:33:54,980 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:33:54,980 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:54,980 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 270 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:33:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-02-11 00:33:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 414. [2022-02-11 00:33:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.053268765133172) internal successors, (1261), 413 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1261 transitions. [2022-02-11 00:33:54,986 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1261 transitions. Word has length 22 [2022-02-11 00:33:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:54,987 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1261 transitions. [2022-02-11 00:33:54,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1261 transitions. [2022-02-11 00:33:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:54,987 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:54,987 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:55,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:55,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-11 00:33:55,204 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash 717262333, now seen corresponding path program 72 times [2022-02-11 00:33:55,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:55,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821538195] [2022-02-11 00:33:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:55,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:55,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:55,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821538195] [2022-02-11 00:33:55,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821538195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:55,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246354609] [2022-02-11 00:33:55,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:33:55,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:55,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:55,301 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:55,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 00:33:55,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:33:55,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:55,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:55,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:33:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:55,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:33:55,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:33:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:55,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:55,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:55,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:56,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:56,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-02-11 00:33:56,051 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:56,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:56,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246354609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:56,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:56,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:33:56,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693649719] [2022-02-11 00:33:56,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:56,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:56,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:56,077 INFO L87 Difference]: Start difference. First operand 414 states and 1261 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:56,512 INFO L93 Difference]: Finished difference Result 953 states and 2735 transitions. [2022-02-11 00:33:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:33:56,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:56,514 INFO L225 Difference]: With dead ends: 953 [2022-02-11 00:33:56,514 INFO L226 Difference]: Without dead ends: 751 [2022-02-11 00:33:56,514 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:33:56,514 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:56,514 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 258 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 629 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-02-11 00:33:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-02-11 00:33:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 433. [2022-02-11 00:33:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.064814814814815) internal successors, (1324), 432 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1324 transitions. [2022-02-11 00:33:56,520 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1324 transitions. Word has length 22 [2022-02-11 00:33:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:56,520 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1324 transitions. [2022-02-11 00:33:56,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1324 transitions. [2022-02-11 00:33:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:56,521 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:56,521 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:56,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:56,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:56,737 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash 56462821, now seen corresponding path program 73 times [2022-02-11 00:33:56,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:56,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713346315] [2022-02-11 00:33:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:33:56,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:56,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713346315] [2022-02-11 00:33:56,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713346315] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:56,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357059763] [2022-02-11 00:33:56,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:33:56,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:56,834 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:56,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 00:33:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:56,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:57,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:57,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-02-11 00:33:57,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:57,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:33:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:57,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:57,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:57,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:57,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:57,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-02-11 00:33:57,625 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:57,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:57,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357059763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:57,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:57,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-02-11 00:33:57,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411012964] [2022-02-11 00:33:57,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:57,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:33:57,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:33:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:33:57,644 INFO L87 Difference]: Start difference. First operand 433 states and 1324 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:57,884 INFO L93 Difference]: Finished difference Result 698 states and 2022 transitions. [2022-02-11 00:33:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:33:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:57,885 INFO L225 Difference]: With dead ends: 698 [2022-02-11 00:33:57,885 INFO L226 Difference]: Without dead ends: 549 [2022-02-11 00:33:57,885 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:33:57,885 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:57,885 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 206 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 471 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-02-11 00:33:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-02-11 00:33:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 424. [2022-02-11 00:33:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.0189125295508275) internal successors, (1277), 423 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1277 transitions. [2022-02-11 00:33:57,890 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1277 transitions. Word has length 22 [2022-02-11 00:33:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:57,890 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1277 transitions. [2022-02-11 00:33:57,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1277 transitions. [2022-02-11 00:33:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:57,891 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:57,891 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:57,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:58,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:58,099 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1579371001, now seen corresponding path program 74 times [2022-02-11 00:33:58,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:58,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713928197] [2022-02-11 00:33:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:58,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:58,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713928197] [2022-02-11 00:33:58,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713928197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:58,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566313217] [2022-02-11 00:33:58,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:33:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:58,273 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:58,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 00:33:58,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:33:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:33:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:33:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:33:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:58,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:33:58,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:33:58,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-02-11 00:33:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:58,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:33:58,997 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:33:58,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:33:59,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:59,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:33:59,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:33:59,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-11 00:33:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:59,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566313217] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:33:59,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:33:59,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:33:59,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371069296] [2022-02-11 00:33:59,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:33:59,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:33:59,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:33:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:33:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:33:59,220 INFO L87 Difference]: Start difference. First operand 424 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:33:59,555 INFO L93 Difference]: Finished difference Result 560 states and 1618 transitions. [2022-02-11 00:33:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:33:59,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:33:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:33:59,556 INFO L225 Difference]: With dead ends: 560 [2022-02-11 00:33:59,556 INFO L226 Difference]: Without dead ends: 439 [2022-02-11 00:33:59,556 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:33:59,556 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:33:59,556 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 240 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 329 Unchecked, 0.2s Time] [2022-02-11 00:33:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-02-11 00:33:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 377. [2022-02-11 00:33:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.00531914893617) internal successors, (1130), 376 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1130 transitions. [2022-02-11 00:33:59,561 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1130 transitions. Word has length 22 [2022-02-11 00:33:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:33:59,561 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1130 transitions. [2022-02-11 00:33:59,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:33:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1130 transitions. [2022-02-11 00:33:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:33:59,562 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:33:59,562 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:33:59,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-11 00:33:59,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-02-11 00:33:59,763 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:33:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:33:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1091476553, now seen corresponding path program 75 times [2022-02-11 00:33:59,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:33:59,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849504003] [2022-02-11 00:33:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:33:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:33:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:33:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:33:59,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:33:59,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849504003] [2022-02-11 00:33:59,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849504003] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:33:59,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442196738] [2022-02-11 00:33:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:33:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:33:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:33:59,924 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:33:59,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 00:34:00,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:34:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:34:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:00,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:34:00,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-02-11 00:34:00,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:34:00,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-02-11 00:34:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:34:00,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:00,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 252 [2022-02-11 00:34:00,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:00,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:34:01,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:34:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:34:01,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442196738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:01,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:01,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-02-11 00:34:01,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850136490] [2022-02-11 00:34:01,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:01,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:34:01,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:34:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:34:01,037 INFO L87 Difference]: Start difference. First operand 377 states and 1130 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:01,312 INFO L93 Difference]: Finished difference Result 564 states and 1652 transitions. [2022-02-11 00:34:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:34:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:01,313 INFO L225 Difference]: With dead ends: 564 [2022-02-11 00:34:01,313 INFO L226 Difference]: Without dead ends: 485 [2022-02-11 00:34:01,313 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:01,313 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:01,314 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 114 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 362 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-02-11 00:34:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-11 00:34:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 370. [2022-02-11 00:34:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.989159891598916) internal successors, (1103), 369 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1103 transitions. [2022-02-11 00:34:01,318 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1103 transitions. Word has length 22 [2022-02-11 00:34:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:01,318 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1103 transitions. [2022-02-11 00:34:01,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1103 transitions. [2022-02-11 00:34:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:01,319 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:01,319 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:01,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:01,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:01,527 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1201613417, now seen corresponding path program 76 times [2022-02-11 00:34:01,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:01,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984820366] [2022-02-11 00:34:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:01,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:01,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984820366] [2022-02-11 00:34:01,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984820366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:01,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022164654] [2022-02-11 00:34:01,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:01,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:01,737 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:01,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 00:34:01,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:01,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:01,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:34:01,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-02-11 00:34:02,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:34:02,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:02,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:02,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:02,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:02,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:02,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-02-11 00:34:02,511 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:34:02,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:02,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022164654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:02,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:02,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-02-11 00:34:02,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41191817] [2022-02-11 00:34:02,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:02,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:34:02,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:34:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:34:02,526 INFO L87 Difference]: Start difference. First operand 370 states and 1103 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:03,448 INFO L93 Difference]: Finished difference Result 801 states and 2266 transitions. [2022-02-11 00:34:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:34:03,448 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:03,449 INFO L225 Difference]: With dead ends: 801 [2022-02-11 00:34:03,449 INFO L226 Difference]: Without dead ends: 722 [2022-02-11 00:34:03,450 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=505, Invalid=1945, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:34:03,450 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:03,450 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 392 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 758 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-02-11 00:34:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-02-11 00:34:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 380. [2022-02-11 00:34:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0) internal successors, (1137), 379 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1137 transitions. [2022-02-11 00:34:03,455 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1137 transitions. Word has length 22 [2022-02-11 00:34:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:03,455 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1137 transitions. [2022-02-11 00:34:03,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1137 transitions. [2022-02-11 00:34:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:03,456 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:03,456 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:03,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-11 00:34:03,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:03,670 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1124796341, now seen corresponding path program 77 times [2022-02-11 00:34:03,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:03,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596544665] [2022-02-11 00:34:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:34:03,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:03,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596544665] [2022-02-11 00:34:03,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596544665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:03,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620020280] [2022-02-11 00:34:03,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:03,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:03,795 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:03,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 00:34:03,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:04,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:04,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:04,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:04,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:34:04,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:04,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:34:04,503 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:34:04,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:04,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620020280] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:04,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:04,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:34:04,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165859241] [2022-02-11 00:34:04,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:34:04,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:34:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:34:04,517 INFO L87 Difference]: Start difference. First operand 380 states and 1137 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:05,180 INFO L93 Difference]: Finished difference Result 555 states and 1625 transitions. [2022-02-11 00:34:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:34:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:05,181 INFO L225 Difference]: With dead ends: 555 [2022-02-11 00:34:05,181 INFO L226 Difference]: Without dead ends: 494 [2022-02-11 00:34:05,182 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:05,182 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 196 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:05,182 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 231 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-02-11 00:34:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 361. [2022-02-11 00:34:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9555555555555557) internal successors, (1064), 360 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1064 transitions. [2022-02-11 00:34:05,187 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1064 transitions. Word has length 22 [2022-02-11 00:34:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:05,187 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1064 transitions. [2022-02-11 00:34:05,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1064 transitions. [2022-02-11 00:34:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:05,188 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:05,188 INFO L515 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:05,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-11 00:34:05,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:05,398 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash -455195744, now seen corresponding path program 78 times [2022-02-11 00:34:05,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:05,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889035640] [2022-02-11 00:34:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:34:05,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:05,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889035640] [2022-02-11 00:34:05,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889035640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:05,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798581928] [2022-02-11 00:34:05,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:05,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:05,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:05,464 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:05,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 00:34:05,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:34:05,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:34:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:05,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:34:05,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:34:05,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:34:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:34:05,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:05,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:34:06,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 144 [2022-02-11 00:34:06,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:06,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 141 [2022-02-11 00:34:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:34:06,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798581928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:06,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:06,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-11 00:34:06,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409576740] [2022-02-11 00:34:06,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:06,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:34:06,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:34:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:34:06,321 INFO L87 Difference]: Start difference. First operand 361 states and 1064 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:06,449 INFO L93 Difference]: Finished difference Result 453 states and 1304 transitions. [2022-02-11 00:34:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:34:06,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:06,450 INFO L225 Difference]: With dead ends: 453 [2022-02-11 00:34:06,450 INFO L226 Difference]: Without dead ends: 378 [2022-02-11 00:34:06,450 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:34:06,450 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:06,450 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 62 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:34:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-02-11 00:34:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 304. [2022-02-11 00:34:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-02-11 00:34:06,454 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-02-11 00:34:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:06,454 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-02-11 00:34:06,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-02-11 00:34:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:06,454 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:06,455 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:06,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-11 00:34:06,659 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222629, now seen corresponding path program 79 times [2022-02-11 00:34:06,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:06,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94390106] [2022-02-11 00:34:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:06,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:06,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94390106] [2022-02-11 00:34:06,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94390106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:06,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461176148] [2022-02-11 00:34:06,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:06,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:06,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:06,753 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:06,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 00:34:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:07,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:07,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:07,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:07,183 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:07,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:07,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:07,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461176148] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:07,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:07,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:34:07,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348261172] [2022-02-11 00:34:07,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:07,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:34:07,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:34:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:34:07,189 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:07,586 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2022-02-11 00:34:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:07,587 INFO L225 Difference]: With dead ends: 485 [2022-02-11 00:34:07,587 INFO L226 Difference]: Without dead ends: 485 [2022-02-11 00:34:07,587 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:07,588 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:07,588 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 248 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-11 00:34:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2022-02-11 00:34:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-02-11 00:34:07,592 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-02-11 00:34:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:07,592 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-02-11 00:34:07,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-02-11 00:34:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:07,592 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:07,592 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:07,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-11 00:34:07,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-02-11 00:34:07,809 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash -260222965, now seen corresponding path program 80 times [2022-02-11 00:34:07,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:07,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950095359] [2022-02-11 00:34:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:07,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:07,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:07,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950095359] [2022-02-11 00:34:07,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950095359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:07,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812528438] [2022-02-11 00:34:07,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:07,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:07,890 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:07,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 00:34:08,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:08,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:08,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:08,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:08,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:08,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:08,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:08,465 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:08,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:08,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:08,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812528438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:08,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:08,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:08,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700465548] [2022-02-11 00:34:08,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:08,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:08,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:08,472 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:08,834 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2022-02-11 00:34:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:34:08,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:08,835 INFO L225 Difference]: With dead ends: 594 [2022-02-11 00:34:08,835 INFO L226 Difference]: Without dead ends: 594 [2022-02-11 00:34:08,836 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:34:08,836 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:08,836 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 233 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-11 00:34:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2022-02-11 00:34:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2022-02-11 00:34:08,841 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2022-02-11 00:34:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:08,841 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2022-02-11 00:34:08,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2022-02-11 00:34:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:08,842 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:08,842 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:08,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-11 00:34:09,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-02-11 00:34:09,061 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1234379999, now seen corresponding path program 81 times [2022-02-11 00:34:09,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:09,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844069445] [2022-02-11 00:34:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:09,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:09,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:09,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844069445] [2022-02-11 00:34:09,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844069445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:09,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406383039] [2022-02-11 00:34:09,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:09,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:09,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:09,152 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:09,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 00:34:09,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:34:09,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:09,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:09,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:09,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:09,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:09,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:09,505 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:09,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:09,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:09,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406383039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:09,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:09,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:34:09,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214550109] [2022-02-11 00:34:09,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:09,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:34:09,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:34:09,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:34:09,510 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:09,742 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2022-02-11 00:34:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:34:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:09,744 INFO L225 Difference]: With dead ends: 573 [2022-02-11 00:34:09,744 INFO L226 Difference]: Without dead ends: 563 [2022-02-11 00:34:09,744 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:09,744 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 226 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:09,744 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 193 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-11 00:34:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2022-02-11 00:34:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2022-02-11 00:34:09,748 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2022-02-11 00:34:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:09,749 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2022-02-11 00:34:09,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2022-02-11 00:34:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:09,749 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:09,749 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:09,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:09,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-11 00:34:09,966 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:09,966 INFO L85 PathProgramCache]: Analyzing trace with hash 915267679, now seen corresponding path program 82 times [2022-02-11 00:34:09,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:09,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454841978] [2022-02-11 00:34:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:09,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:10,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:10,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454841978] [2022-02-11 00:34:10,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454841978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:10,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487939089] [2022-02-11 00:34:10,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:10,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:10,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:10,057 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:10,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 00:34:10,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:10,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:10,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:10,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:10,570 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:10,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:10,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:10,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487939089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:10,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:10,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:10,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159300887] [2022-02-11 00:34:10,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:10,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:10,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:10,578 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:10,965 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2022-02-11 00:34:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:34:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:10,966 INFO L225 Difference]: With dead ends: 506 [2022-02-11 00:34:10,966 INFO L226 Difference]: Without dead ends: 506 [2022-02-11 00:34:10,966 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:34:10,966 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:10,967 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 252 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-11 00:34:10,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2022-02-11 00:34:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-02-11 00:34:10,971 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-02-11 00:34:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:10,971 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-02-11 00:34:10,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-02-11 00:34:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:10,971 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:10,971 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:10,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:11,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:11,189 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1143347419, now seen corresponding path program 83 times [2022-02-11 00:34:11,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:11,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106510842] [2022-02-11 00:34:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:11,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:11,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:11,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106510842] [2022-02-11 00:34:11,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106510842] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:11,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383300933] [2022-02-11 00:34:11,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:11,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:11,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:11,248 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:11,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 00:34:11,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:34:11,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:11,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:11,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:11,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:11,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:11,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:34:11,732 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:11,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:11,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:11,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383300933] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:11,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:11,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:11,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636093851] [2022-02-11 00:34:11,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:11,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:11,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:11,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:11,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:11,739 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:12,148 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2022-02-11 00:34:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:34:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:12,150 INFO L225 Difference]: With dead ends: 458 [2022-02-11 00:34:12,150 INFO L226 Difference]: Without dead ends: 458 [2022-02-11 00:34:12,150 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=848, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:34:12,150 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 210 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:12,150 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 151 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-11 00:34:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2022-02-11 00:34:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2022-02-11 00:34:12,156 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2022-02-11 00:34:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:12,156 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2022-02-11 00:34:12,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2022-02-11 00:34:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:12,157 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:12,157 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:12,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:12,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-11 00:34:12,358 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:12,358 INFO L85 PathProgramCache]: Analyzing trace with hash 351255545, now seen corresponding path program 84 times [2022-02-11 00:34:12,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:12,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818251967] [2022-02-11 00:34:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:12,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:12,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:12,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818251967] [2022-02-11 00:34:12,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818251967] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:12,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948298011] [2022-02-11 00:34:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:12,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:12,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:12,427 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:12,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 00:34:12,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:34:12,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:12,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:12,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:12,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:12,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:12,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:12,792 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:12,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:12,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:12,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948298011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:12,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:12,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:12,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462623747] [2022-02-11 00:34:12,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:12,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:12,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:12,797 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:13,046 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2022-02-11 00:34:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:13,047 INFO L225 Difference]: With dead ends: 475 [2022-02-11 00:34:13,047 INFO L226 Difference]: Without dead ends: 465 [2022-02-11 00:34:13,047 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:13,047 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 176 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:13,048 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 174 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:13,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-02-11 00:34:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2022-02-11 00:34:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2022-02-11 00:34:13,051 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2022-02-11 00:34:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2022-02-11 00:34:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2022-02-11 00:34:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:13,052 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:13,052 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:13,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:13,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-11 00:34:13,269 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 776202755, now seen corresponding path program 85 times [2022-02-11 00:34:13,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:13,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101870124] [2022-02-11 00:34:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:13,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:13,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:13,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101870124] [2022-02-11 00:34:13,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101870124] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:13,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458134466] [2022-02-11 00:34:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:13,312 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:13,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 00:34:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:13,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:13,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:13,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:13,667 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:13,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:13,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:13,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458134466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:13,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:13,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:13,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833781414] [2022-02-11 00:34:13,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:13,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:13,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:13,672 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:13,938 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-02-11 00:34:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:13,939 INFO L225 Difference]: With dead ends: 429 [2022-02-11 00:34:13,939 INFO L226 Difference]: Without dead ends: 409 [2022-02-11 00:34:13,939 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:34:13,939 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:13,940 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 232 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-11 00:34:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 322. [2022-02-11 00:34:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2022-02-11 00:34:13,943 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2022-02-11 00:34:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:13,943 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2022-02-11 00:34:13,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2022-02-11 00:34:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:13,944 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:13,944 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:13,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-11 00:34:14,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-11 00:34:14,160 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 937124177, now seen corresponding path program 86 times [2022-02-11 00:34:14,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:14,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341443617] [2022-02-11 00:34:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:14,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:14,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341443617] [2022-02-11 00:34:14,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341443617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:14,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869546700] [2022-02-11 00:34:14,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:14,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:14,260 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:14,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 00:34:14,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:14,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:14,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:14,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:14,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:14,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:14,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:34:14,802 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:14,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:14,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:14,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869546700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:14,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:14,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:14,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22852710] [2022-02-11 00:34:14,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:14,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:14,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:14,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:14,809 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:15,207 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2022-02-11 00:34:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:15,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:15,208 INFO L225 Difference]: With dead ends: 488 [2022-02-11 00:34:15,208 INFO L226 Difference]: Without dead ends: 488 [2022-02-11 00:34:15,208 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:34:15,208 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 207 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:15,208 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 218 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-02-11 00:34:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2022-02-11 00:34:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2022-02-11 00:34:15,212 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2022-02-11 00:34:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:15,213 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2022-02-11 00:34:15,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2022-02-11 00:34:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:15,215 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:15,215 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:15,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:15,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:15,423 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1863240155, now seen corresponding path program 87 times [2022-02-11 00:34:15,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:15,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38119275] [2022-02-11 00:34:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:15,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:15,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38119275] [2022-02-11 00:34:15,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38119275] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:15,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320631281] [2022-02-11 00:34:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:15,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:15,506 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:15,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 00:34:15,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:34:15,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:15,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:15,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:15,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:15,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:15,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:15,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:34:15,938 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:15,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:15,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:15,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320631281] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:15,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:15,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:15,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756431345] [2022-02-11 00:34:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:15,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:15,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:15,944 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:16,160 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2022-02-11 00:34:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:16,161 INFO L225 Difference]: With dead ends: 473 [2022-02-11 00:34:16,161 INFO L226 Difference]: Without dead ends: 463 [2022-02-11 00:34:16,161 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:34:16,161 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:16,161 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 227 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-11 00:34:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2022-02-11 00:34:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2022-02-11 00:34:16,165 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2022-02-11 00:34:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:16,165 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2022-02-11 00:34:16,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2022-02-11 00:34:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:16,166 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:16,166 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:16,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:16,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-02-11 00:34:16,382 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2112614821, now seen corresponding path program 88 times [2022-02-11 00:34:16,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:16,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957527297] [2022-02-11 00:34:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:16,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:16,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957527297] [2022-02-11 00:34:16,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957527297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:16,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081662597] [2022-02-11 00:34:16,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:16,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:16,454 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:16,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 00:34:16,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:16,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:16,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:16,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:16,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:34:16,802 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:16,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:16,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:16,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081662597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:16,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:16,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:16,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095948055] [2022-02-11 00:34:16,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:16,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:16,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:16,808 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:17,017 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2022-02-11 00:34:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:17,018 INFO L225 Difference]: With dead ends: 400 [2022-02-11 00:34:17,018 INFO L226 Difference]: Without dead ends: 400 [2022-02-11 00:34:17,018 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:17,019 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:17,019 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 195 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:17,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-02-11 00:34:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2022-02-11 00:34:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-02-11 00:34:17,022 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-02-11 00:34:17,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:17,023 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-02-11 00:34:17,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-02-11 00:34:17,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:17,024 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:17,024 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:17,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:17,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-02-11 00:34:17,241 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -359358453, now seen corresponding path program 89 times [2022-02-11 00:34:17,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:17,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26770253] [2022-02-11 00:34:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:17,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:17,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26770253] [2022-02-11 00:34:17,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26770253] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:17,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98130289] [2022-02-11 00:34:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:17,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:17,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:17,289 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:17,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 00:34:17,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:34:17,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:17,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:17,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:17,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:17,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:34:17,672 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:17,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:17,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:17,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98130289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:17,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:17,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:17,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610859348] [2022-02-11 00:34:17,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:17,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:17,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:17,676 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:17,930 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2022-02-11 00:34:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:17,931 INFO L225 Difference]: With dead ends: 563 [2022-02-11 00:34:17,931 INFO L226 Difference]: Without dead ends: 563 [2022-02-11 00:34:17,931 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:34:17,931 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:17,931 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 225 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-11 00:34:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2022-02-11 00:34:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2022-02-11 00:34:17,935 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2022-02-11 00:34:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:17,936 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2022-02-11 00:34:17,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2022-02-11 00:34:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:17,937 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:17,937 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:17,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-11 00:34:18,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-11 00:34:18,154 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1135244511, now seen corresponding path program 90 times [2022-02-11 00:34:18,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:18,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445509922] [2022-02-11 00:34:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:18,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:18,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445509922] [2022-02-11 00:34:18,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445509922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:18,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042044689] [2022-02-11 00:34:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:18,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:18,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:18,208 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:18,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 00:34:18,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:34:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:18,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:18,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:18,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:18,582 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:18,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:18,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:18,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042044689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:18,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:18,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:18,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267684302] [2022-02-11 00:34:18,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:18,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:18,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:18,587 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:18,980 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2022-02-11 00:34:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:34:18,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:18,981 INFO L225 Difference]: With dead ends: 595 [2022-02-11 00:34:18,981 INFO L226 Difference]: Without dead ends: 585 [2022-02-11 00:34:18,981 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:34:18,981 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:18,982 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 225 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-02-11 00:34:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2022-02-11 00:34:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2022-02-11 00:34:18,986 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2022-02-11 00:34:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:18,986 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2022-02-11 00:34:18,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2022-02-11 00:34:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:18,986 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:18,986 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:19,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:19,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:19,203 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1560191721, now seen corresponding path program 91 times [2022-02-11 00:34:19,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:19,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514524797] [2022-02-11 00:34:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:19,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:19,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:19,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514524797] [2022-02-11 00:34:19,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514524797] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:19,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827170630] [2022-02-11 00:34:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:19,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:19,263 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:19,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 00:34:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:19,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:19,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:19,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:19,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:19,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:19,617 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:19,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:19,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:19,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827170630] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:19,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:19,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:19,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815496835] [2022-02-11 00:34:19,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:19,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:19,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:19,622 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:19,903 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2022-02-11 00:34:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:34:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:19,904 INFO L225 Difference]: With dead ends: 572 [2022-02-11 00:34:19,904 INFO L226 Difference]: Without dead ends: 552 [2022-02-11 00:34:19,904 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:34:19,905 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 146 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:19,905 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 245 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-02-11 00:34:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2022-02-11 00:34:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2022-02-11 00:34:19,909 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2022-02-11 00:34:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:19,909 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2022-02-11 00:34:19,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2022-02-11 00:34:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:19,909 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:19,909 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:19,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:20,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:20,126 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash -963179015, now seen corresponding path program 92 times [2022-02-11 00:34:20,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:20,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863955708] [2022-02-11 00:34:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:20,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:20,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:20,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863955708] [2022-02-11 00:34:20,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863955708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:20,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704763094] [2022-02-11 00:34:20,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:20,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:20,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:20,173 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:20,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 00:34:20,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:20,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:20,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:20,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:20,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:20,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:20,553 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:20,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:20,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:20,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704763094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:20,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:20,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:20,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956323218] [2022-02-11 00:34:20,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:20,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:20,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:20,558 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:20,845 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2022-02-11 00:34:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:20,845 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:20,846 INFO L225 Difference]: With dead ends: 515 [2022-02-11 00:34:20,846 INFO L226 Difference]: Without dead ends: 479 [2022-02-11 00:34:20,846 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:20,846 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 151 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:20,846 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 278 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-11 00:34:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2022-02-11 00:34:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2022-02-11 00:34:20,850 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2022-02-11 00:34:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:20,850 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2022-02-11 00:34:20,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2022-02-11 00:34:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:20,851 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:20,851 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:20,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:21,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:21,070 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:21,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 978208761, now seen corresponding path program 93 times [2022-02-11 00:34:21,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:21,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388350403] [2022-02-11 00:34:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:21,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:21,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:21,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388350403] [2022-02-11 00:34:21,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388350403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:21,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190988428] [2022-02-11 00:34:21,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:21,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:21,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:21,143 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:21,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-11 00:34:21,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:34:21,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:21,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:34:21,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:21,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:34:21,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-11 00:34:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:34:21,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:21,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2022-02-11 00:34:21,720 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:21,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:21,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:34:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:34:21,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190988428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:21,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:21,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-02-11 00:34:21,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443329303] [2022-02-11 00:34:21,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:21,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:34:21,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:34:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:34:21,725 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:21,976 INFO L93 Difference]: Finished difference Result 546 states and 1595 transitions. [2022-02-11 00:34:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:34:21,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:21,977 INFO L225 Difference]: With dead ends: 546 [2022-02-11 00:34:21,977 INFO L226 Difference]: Without dead ends: 444 [2022-02-11 00:34:21,977 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:34:21,978 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:21,978 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 204 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-02-11 00:34:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 304. [2022-02-11 00:34:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-02-11 00:34:21,981 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-02-11 00:34:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:21,981 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-02-11 00:34:21,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-02-11 00:34:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:21,982 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:21,982 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:21,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:22,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-11 00:34:22,198 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2067370929, now seen corresponding path program 94 times [2022-02-11 00:34:22,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:22,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271348566] [2022-02-11 00:34:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:22,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:22,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:22,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271348566] [2022-02-11 00:34:22,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271348566] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:22,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116757712] [2022-02-11 00:34:22,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:22,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:22,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:22,282 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:22,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-11 00:34:22,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:22,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:22,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:22,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:22,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:22,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:22,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:22,773 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:22,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:22,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:22,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116757712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:22,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:22,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:34:22,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020646776] [2022-02-11 00:34:22,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:22,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:34:22,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:34:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:34:22,781 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:23,277 INFO L93 Difference]: Finished difference Result 708 states and 2027 transitions. [2022-02-11 00:34:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:34:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:23,278 INFO L225 Difference]: With dead ends: 708 [2022-02-11 00:34:23,278 INFO L226 Difference]: Without dead ends: 708 [2022-02-11 00:34:23,278 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:34:23,278 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:23,278 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 274 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-11 00:34:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 321. [2022-02-11 00:34:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.984375) internal successors, (955), 320 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 955 transitions. [2022-02-11 00:34:23,283 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 955 transitions. Word has length 22 [2022-02-11 00:34:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:23,283 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 955 transitions. [2022-02-11 00:34:23,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 955 transitions. [2022-02-11 00:34:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:23,283 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:23,284 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:23,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:23,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-11 00:34:23,501 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1697886599, now seen corresponding path program 95 times [2022-02-11 00:34:23,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:23,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621592271] [2022-02-11 00:34:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:23,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:23,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621592271] [2022-02-11 00:34:23,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621592271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:23,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503308235] [2022-02-11 00:34:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:23,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:23,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:23,554 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:23,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-11 00:34:23,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:34:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:23,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:23,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:23,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:23,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:24,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:24,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:24,047 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:24,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:24,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:24,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503308235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:24,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:24,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:34:24,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317948993] [2022-02-11 00:34:24,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:24,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:34:24,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:34:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:34:24,054 INFO L87 Difference]: Start difference. First operand 321 states and 955 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:24,482 INFO L93 Difference]: Finished difference Result 618 states and 1796 transitions. [2022-02-11 00:34:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:34:24,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:24,483 INFO L225 Difference]: With dead ends: 618 [2022-02-11 00:34:24,483 INFO L226 Difference]: Without dead ends: 609 [2022-02-11 00:34:24,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:24,484 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 166 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:24,484 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 200 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-02-11 00:34:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 327. [2022-02-11 00:34:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9662576687116564) internal successors, (967), 326 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 967 transitions. [2022-02-11 00:34:24,490 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 967 transitions. Word has length 22 [2022-02-11 00:34:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:24,490 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 967 transitions. [2022-02-11 00:34:24,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 967 transitions. [2022-02-11 00:34:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:24,491 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:24,491 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:24,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-11 00:34:24,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-11 00:34:24,705 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1479625607, now seen corresponding path program 96 times [2022-02-11 00:34:24,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:24,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661737284] [2022-02-11 00:34:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:24,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:24,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:24,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661737284] [2022-02-11 00:34:24,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661737284] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:24,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387836295] [2022-02-11 00:34:24,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:24,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:24,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:24,804 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:24,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-11 00:34:24,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:34:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:24,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:25,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:25,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:25,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:25,268 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:25,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:25,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:25,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387836295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:25,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:25,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:34:25,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839026928] [2022-02-11 00:34:25,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:25,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:34:25,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:34:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:34:25,273 INFO L87 Difference]: Start difference. First operand 327 states and 967 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:25,582 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2022-02-11 00:34:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:34:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:25,583 INFO L225 Difference]: With dead ends: 546 [2022-02-11 00:34:25,583 INFO L226 Difference]: Without dead ends: 546 [2022-02-11 00:34:25,583 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:34:25,583 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 148 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:25,583 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 229 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-02-11 00:34:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2022-02-11 00:34:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-02-11 00:34:25,587 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-02-11 00:34:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:25,587 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-02-11 00:34:25,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-02-11 00:34:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:25,588 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:25,588 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:25,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:25,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-11 00:34:25,801 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash -553534529, now seen corresponding path program 97 times [2022-02-11 00:34:25,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:25,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112807662] [2022-02-11 00:34:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:25,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:25,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:25,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112807662] [2022-02-11 00:34:25,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112807662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:25,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879694416] [2022-02-11 00:34:25,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:25,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:25,905 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:25,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-11 00:34:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:26,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:26,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:26,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:34:26,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:34:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:26,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:26,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:26,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:26,402 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:26,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:26,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:26,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879694416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:26,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:26,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:26,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776420855] [2022-02-11 00:34:26,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:26,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:26,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:26,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:26,407 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:26,776 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2022-02-11 00:34:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:34:26,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:26,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:26,777 INFO L225 Difference]: With dead ends: 733 [2022-02-11 00:34:26,777 INFO L226 Difference]: Without dead ends: 733 [2022-02-11 00:34:26,778 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:34:26,778 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 228 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:26,778 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 196 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-11 00:34:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 323. [2022-02-11 00:34:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.012422360248447) internal successors, (970), 322 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 970 transitions. [2022-02-11 00:34:26,782 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 970 transitions. Word has length 22 [2022-02-11 00:34:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 970 transitions. [2022-02-11 00:34:26,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 970 transitions. [2022-02-11 00:34:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:26,783 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:26,783 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:26,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:26,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-02-11 00:34:26,999 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash 941068435, now seen corresponding path program 98 times [2022-02-11 00:34:26,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:27,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087740200] [2022-02-11 00:34:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:27,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:27,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087740200] [2022-02-11 00:34:27,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087740200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:27,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216682161] [2022-02-11 00:34:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:27,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:27,087 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:27,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-11 00:34:27,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:27,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:27,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:27,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:27,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:34:27,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:34:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:27,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:27,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:27,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:27,753 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:27,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:27,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:27,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216682161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:27,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:27,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:34:27,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442489140] [2022-02-11 00:34:27,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:27,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:34:27,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:27,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:34:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:34:27,762 INFO L87 Difference]: Start difference. First operand 323 states and 970 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:28,254 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2022-02-11 00:34:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:28,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:28,256 INFO L225 Difference]: With dead ends: 767 [2022-02-11 00:34:28,256 INFO L226 Difference]: Without dead ends: 757 [2022-02-11 00:34:28,256 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:34:28,256 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 255 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:28,256 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 154 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-11 00:34:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 330. [2022-02-11 00:34:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2022-02-11 00:34:28,261 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 22 [2022-02-11 00:34:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:28,261 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2022-02-11 00:34:28,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2022-02-11 00:34:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:28,262 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:28,262 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:28,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:28,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:28,478 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:28,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1982143627, now seen corresponding path program 99 times [2022-02-11 00:34:28,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:28,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126809435] [2022-02-11 00:34:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:28,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:28,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:28,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126809435] [2022-02-11 00:34:28,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126809435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:28,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452511218] [2022-02-11 00:34:28,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:28,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:28,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:28,598 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:28,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-11 00:34:28,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:34:28,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:28,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:28,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:28,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:34:28,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:34:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:29,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:29,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:29,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:29,301 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:29,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:29,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:29,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452511218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:29,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:29,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:29,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721396929] [2022-02-11 00:34:29,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:29,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:29,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:29,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:29,306 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:29,764 INFO L93 Difference]: Finished difference Result 820 states and 2355 transitions. [2022-02-11 00:34:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:34:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:29,766 INFO L225 Difference]: With dead ends: 820 [2022-02-11 00:34:29,766 INFO L226 Difference]: Without dead ends: 820 [2022-02-11 00:34:29,766 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:34:29,766 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 254 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:29,766 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 194 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-02-11 00:34:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 336. [2022-02-11 00:34:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.017910447761194) internal successors, (1011), 335 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1011 transitions. [2022-02-11 00:34:29,772 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1011 transitions. Word has length 22 [2022-02-11 00:34:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:29,773 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1011 transitions. [2022-02-11 00:34:29,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1011 transitions. [2022-02-11 00:34:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:29,773 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:29,773 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:29,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:29,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:29,987 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:29,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash -94685677, now seen corresponding path program 100 times [2022-02-11 00:34:29,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:29,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604278989] [2022-02-11 00:34:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:29,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:30,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:30,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604278989] [2022-02-11 00:34:30,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604278989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:30,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579798819] [2022-02-11 00:34:30,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:30,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:30,071 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:30,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-11 00:34:30,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:30,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:30,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:34:30,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:34:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:30,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:30,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:30,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:30,536 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:30,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:30,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:30,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579798819] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:30,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:30,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:30,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120657030] [2022-02-11 00:34:30,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:30,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:30,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:30,540 INFO L87 Difference]: Start difference. First operand 336 states and 1011 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:30,842 INFO L93 Difference]: Finished difference Result 769 states and 2220 transitions. [2022-02-11 00:34:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:30,843 INFO L225 Difference]: With dead ends: 769 [2022-02-11 00:34:30,843 INFO L226 Difference]: Without dead ends: 760 [2022-02-11 00:34:30,843 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:34:30,843 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 243 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:30,844 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 184 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:34:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-11 00:34:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 342. [2022-02-11 00:34:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0) internal successors, (1023), 341 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1023 transitions. [2022-02-11 00:34:30,848 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1023 transitions. Word has length 22 [2022-02-11 00:34:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:30,848 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1023 transitions. [2022-02-11 00:34:30,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1023 transitions. [2022-02-11 00:34:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:30,849 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:30,849 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:30,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:31,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-02-11 00:34:31,063 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 247563817, now seen corresponding path program 101 times [2022-02-11 00:34:31,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:31,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902346291] [2022-02-11 00:34:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:31,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:31,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902346291] [2022-02-11 00:34:31,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902346291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:31,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877149056] [2022-02-11 00:34:31,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:31,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:31,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:31,151 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:31,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-11 00:34:31,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:34:31,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:31,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:31,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:34:31,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:34:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:31,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:31,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:31,552 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:31,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:31,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:31,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877149056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:31,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:31,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-11 00:34:31,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344732590] [2022-02-11 00:34:31,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:31,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:34:31,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:34:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:34:31,557 INFO L87 Difference]: Start difference. First operand 342 states and 1023 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:31,914 INFO L93 Difference]: Finished difference Result 812 states and 2302 transitions. [2022-02-11 00:34:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:31,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:31,916 INFO L225 Difference]: With dead ends: 812 [2022-02-11 00:34:31,916 INFO L226 Difference]: Without dead ends: 802 [2022-02-11 00:34:31,916 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:31,916 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:31,916 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 225 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-02-11 00:34:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 354. [2022-02-11 00:34:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0056657223796033) internal successors, (1061), 353 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1061 transitions. [2022-02-11 00:34:31,922 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1061 transitions. Word has length 22 [2022-02-11 00:34:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:31,922 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1061 transitions. [2022-02-11 00:34:31,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1061 transitions. [2022-02-11 00:34:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:31,923 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:31,923 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:31,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-02-11 00:34:32,143 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1333208099, now seen corresponding path program 102 times [2022-02-11 00:34:32,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:32,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973186906] [2022-02-11 00:34:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:32,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:32,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:32,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973186906] [2022-02-11 00:34:32,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973186906] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:32,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558259584] [2022-02-11 00:34:32,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:32,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:32,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:32,219 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:32,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-11 00:34:32,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:34:32,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:32,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:32,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:34:32,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:34:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:32,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:32,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:32,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:32,644 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:32,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:32,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:32,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558259584] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:32,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:32,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-11 00:34:32,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953746206] [2022-02-11 00:34:32,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:32,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:34:32,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:34:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:34:32,649 INFO L87 Difference]: Start difference. First operand 354 states and 1061 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:32,896 INFO L93 Difference]: Finished difference Result 726 states and 2094 transitions. [2022-02-11 00:34:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:32,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:32,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:32,898 INFO L225 Difference]: With dead ends: 726 [2022-02-11 00:34:32,898 INFO L226 Difference]: Without dead ends: 714 [2022-02-11 00:34:32,898 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:34:32,899 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:32,899 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 148 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:34:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-11 00:34:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 350. [2022-02-11 00:34:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.005730659025788) internal successors, (1049), 349 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1049 transitions. [2022-02-11 00:34:32,903 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1049 transitions. Word has length 22 [2022-02-11 00:34:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:32,904 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1049 transitions. [2022-02-11 00:34:32,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1049 transitions. [2022-02-11 00:34:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:32,904 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:32,904 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:32,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:33,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:33,121 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:33,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1614312619, now seen corresponding path program 103 times [2022-02-11 00:34:33,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:33,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768255716] [2022-02-11 00:34:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:33,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:33,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768255716] [2022-02-11 00:34:33,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768255716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:33,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613320348] [2022-02-11 00:34:33,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:33,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:33,225 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:33,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-11 00:34:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:33,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:33,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:33,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-02-11 00:34:33,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-02-11 00:34:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:33,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:33,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:33,655 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:33,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:33,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:33,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613320348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:33,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:33,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:33,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327124937] [2022-02-11 00:34:33,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:33,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:33,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:33,660 INFO L87 Difference]: Start difference. First operand 350 states and 1049 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:34,028 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2022-02-11 00:34:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:34,029 INFO L225 Difference]: With dead ends: 689 [2022-02-11 00:34:34,029 INFO L226 Difference]: Without dead ends: 689 [2022-02-11 00:34:34,030 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:34:34,030 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 170 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:34,030 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 195 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-02-11 00:34:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 355. [2022-02-11 00:34:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0) internal successors, (1062), 354 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1062 transitions. [2022-02-11 00:34:34,035 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1062 transitions. Word has length 22 [2022-02-11 00:34:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:34,035 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1062 transitions. [2022-02-11 00:34:34,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1062 transitions. [2022-02-11 00:34:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:34,035 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:34,035 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:34,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-11 00:34:34,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:34,252 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash -119709655, now seen corresponding path program 104 times [2022-02-11 00:34:34,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:34,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602714288] [2022-02-11 00:34:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:34,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:34,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:34,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602714288] [2022-02-11 00:34:34,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602714288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:34,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836220638] [2022-02-11 00:34:34,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:34,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:34,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:34,338 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:34,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-11 00:34:34,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:34,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:34,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:34,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:34,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:34,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-02-11 00:34:34,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:34:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:34,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:34,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:34,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:34,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:34,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:35,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:35,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836220638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:35,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:35,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:34:35,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522864368] [2022-02-11 00:34:35,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:35,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:34:35,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:34:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:34:35,006 INFO L87 Difference]: Start difference. First operand 355 states and 1062 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:35,400 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2022-02-11 00:34:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:35,401 INFO L225 Difference]: With dead ends: 680 [2022-02-11 00:34:35,401 INFO L226 Difference]: Without dead ends: 670 [2022-02-11 00:34:35,401 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:35,401 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:35,401 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 195 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-11 00:34:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 334. [2022-02-11 00:34:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.96996996996997) internal successors, (989), 333 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 989 transitions. [2022-02-11 00:34:35,406 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 989 transitions. Word has length 22 [2022-02-11 00:34:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 989 transitions. [2022-02-11 00:34:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 989 transitions. [2022-02-11 00:34:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:35,407 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:35,407 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:35,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:35,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-11 00:34:35,611 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash -645629941, now seen corresponding path program 105 times [2022-02-11 00:34:35,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:35,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105479232] [2022-02-11 00:34:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:35,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:35,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:35,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105479232] [2022-02-11 00:34:35,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105479232] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:35,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653183332] [2022-02-11 00:34:35,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:35,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:35,700 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:35,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-11 00:34:35,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:34:35,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:35,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:35,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:36,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:36,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:36,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:36,326 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:36,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:36,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:36,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653183332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:36,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:36,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:36,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127811387] [2022-02-11 00:34:36,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:36,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:36,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:36,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:36,331 INFO L87 Difference]: Start difference. First operand 334 states and 989 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:36,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:36,622 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2022-02-11 00:34:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:36,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:36,623 INFO L225 Difference]: With dead ends: 594 [2022-02-11 00:34:36,623 INFO L226 Difference]: Without dead ends: 594 [2022-02-11 00:34:36,623 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:34:36,624 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:36,624 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 222 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-11 00:34:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2022-02-11 00:34:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2022-02-11 00:34:36,628 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2022-02-11 00:34:36,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:36,628 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2022-02-11 00:34:36,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2022-02-11 00:34:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:36,629 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:36,629 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:36,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:36,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-11 00:34:36,845 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:36,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash -139412553, now seen corresponding path program 106 times [2022-02-11 00:34:36,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:36,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248899033] [2022-02-11 00:34:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:36,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:36,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248899033] [2022-02-11 00:34:36,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248899033] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:36,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220548153] [2022-02-11 00:34:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:36,946 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:36,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-11 00:34:37,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:37,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:37,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:37,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:37,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:37,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:37,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:37,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:37,594 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:37,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:37,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:37,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220548153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:37,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:37,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:37,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532448727] [2022-02-11 00:34:37,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:37,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:37,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:37,603 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:37,998 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2022-02-11 00:34:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:37,999 INFO L225 Difference]: With dead ends: 655 [2022-02-11 00:34:37,999 INFO L226 Difference]: Without dead ends: 655 [2022-02-11 00:34:38,000 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:34:38,015 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:38,015 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 186 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-11 00:34:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 339. [2022-02-11 00:34:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9822485207100593) internal successors, (1008), 338 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1008 transitions. [2022-02-11 00:34:38,020 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1008 transitions. Word has length 22 [2022-02-11 00:34:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:38,020 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1008 transitions. [2022-02-11 00:34:38,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1008 transitions. [2022-02-11 00:34:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:38,021 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:38,021 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:38,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-11 00:34:38,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-11 00:34:38,236 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2078725439, now seen corresponding path program 107 times [2022-02-11 00:34:38,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:38,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101663855] [2022-02-11 00:34:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:38,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:38,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101663855] [2022-02-11 00:34:38,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101663855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:38,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273021220] [2022-02-11 00:34:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:38,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:38,294 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:38,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-11 00:34:38,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:34:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:38,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:38,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:38,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:38,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:38,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:38,737 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:38,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:38,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:38,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273021220] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:38,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:38,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:34:38,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280521309] [2022-02-11 00:34:38,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:38,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:34:38,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:34:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:34:38,741 INFO L87 Difference]: Start difference. First operand 339 states and 1008 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:39,086 INFO L93 Difference]: Finished difference Result 637 states and 1840 transitions. [2022-02-11 00:34:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:39,087 INFO L225 Difference]: With dead ends: 637 [2022-02-11 00:34:39,087 INFO L226 Difference]: Without dead ends: 628 [2022-02-11 00:34:39,088 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:39,088 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:39,088 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 229 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:39,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-02-11 00:34:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 339. [2022-02-11 00:34:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9526627218934913) internal successors, (998), 338 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 998 transitions. [2022-02-11 00:34:39,093 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 998 transitions. Word has length 22 [2022-02-11 00:34:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:39,093 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 998 transitions. [2022-02-11 00:34:39,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 998 transitions. [2022-02-11 00:34:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:39,094 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:39,094 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:39,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:39,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:39,311 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2043126113, now seen corresponding path program 108 times [2022-02-11 00:34:39,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:39,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985963645] [2022-02-11 00:34:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:39,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:39,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985963645] [2022-02-11 00:34:39,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985963645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:39,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381962790] [2022-02-11 00:34:39,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:39,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:39,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:39,403 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:39,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-11 00:34:39,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:34:39,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:39,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:34:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:39,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:39,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:39,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:34:39,826 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:39,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:39,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:39,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381962790] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:39,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:39,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:39,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596495363] [2022-02-11 00:34:39,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:39,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:39,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:39,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:39,832 INFO L87 Difference]: Start difference. First operand 339 states and 998 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:40,136 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2022-02-11 00:34:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:40,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:40,137 INFO L225 Difference]: With dead ends: 565 [2022-02-11 00:34:40,137 INFO L226 Difference]: Without dead ends: 565 [2022-02-11 00:34:40,137 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:34:40,137 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:40,137 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 226 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-11 00:34:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 309. [2022-02-11 00:34:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-02-11 00:34:40,141 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-02-11 00:34:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:40,142 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-02-11 00:34:40,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-02-11 00:34:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:40,142 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:40,142 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:40,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-02-11 00:34:40,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-11 00:34:40,344 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash -41099855, now seen corresponding path program 109 times [2022-02-11 00:34:40,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:40,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581983966] [2022-02-11 00:34:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:40,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:40,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:40,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581983966] [2022-02-11 00:34:40,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581983966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:40,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419077422] [2022-02-11 00:34:40,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:40,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:40,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:40,441 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:40,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-11 00:34:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:40,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:40,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:40,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:34:40,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:34:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:40,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:41,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:41,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:41,266 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:41,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:41,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:41,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419077422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:41,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:41,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:41,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754593072] [2022-02-11 00:34:41,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:41,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:41,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:41,278 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:41,575 INFO L93 Difference]: Finished difference Result 477 states and 1389 transitions. [2022-02-11 00:34:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:41,577 INFO L225 Difference]: With dead ends: 477 [2022-02-11 00:34:41,577 INFO L226 Difference]: Without dead ends: 477 [2022-02-11 00:34:41,579 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:41,579 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:41,580 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 224 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:41,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-11 00:34:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 319. [2022-02-11 00:34:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9779874213836477) internal successors, (947), 318 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 947 transitions. [2022-02-11 00:34:41,587 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 947 transitions. Word has length 22 [2022-02-11 00:34:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:41,587 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 947 transitions. [2022-02-11 00:34:41,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 947 transitions. [2022-02-11 00:34:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:41,588 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:41,588 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:41,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-11 00:34:41,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-11 00:34:41,805 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1453503109, now seen corresponding path program 110 times [2022-02-11 00:34:41,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:41,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787839318] [2022-02-11 00:34:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:41,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:41,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787839318] [2022-02-11 00:34:41,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787839318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:41,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611948209] [2022-02-11 00:34:41,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:41,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:41,892 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:41,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-11 00:34:41,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:42,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:42,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:34:42,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:34:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:42,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:42,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:42,363 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:42,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:42,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:42,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611948209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:42,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:42,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:42,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490049530] [2022-02-11 00:34:42,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:42,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:42,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:42,368 INFO L87 Difference]: Start difference. First operand 319 states and 947 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:42,645 INFO L93 Difference]: Finished difference Result 504 states and 1456 transitions. [2022-02-11 00:34:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:42,646 INFO L225 Difference]: With dead ends: 504 [2022-02-11 00:34:42,646 INFO L226 Difference]: Without dead ends: 494 [2022-02-11 00:34:42,646 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:42,647 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 162 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:42,647 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 209 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-02-11 00:34:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 316. [2022-02-11 00:34:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.9682539682539684) internal successors, (935), 315 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 935 transitions. [2022-02-11 00:34:42,650 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 935 transitions. Word has length 22 [2022-02-11 00:34:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:42,651 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 935 transitions. [2022-02-11 00:34:42,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 935 transitions. [2022-02-11 00:34:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:42,651 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:42,651 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:42,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:42,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-11 00:34:42,867 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1878450319, now seen corresponding path program 111 times [2022-02-11 00:34:42,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:42,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437328999] [2022-02-11 00:34:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:42,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:42,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437328999] [2022-02-11 00:34:42,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437328999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:42,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541590656] [2022-02-11 00:34:42,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:42,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:42,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:42,966 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:42,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-11 00:34:43,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:34:43,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:43,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:43,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:43,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:43,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:43,484 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:43,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:43,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:43,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541590656] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:43,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:43,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:43,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522407564] [2022-02-11 00:34:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:43,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:43,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:43,491 INFO L87 Difference]: Start difference. First operand 316 states and 935 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:43,759 INFO L93 Difference]: Finished difference Result 465 states and 1354 transitions. [2022-02-11 00:34:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:43,760 INFO L225 Difference]: With dead ends: 465 [2022-02-11 00:34:43,760 INFO L226 Difference]: Without dead ends: 445 [2022-02-11 00:34:43,760 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:34:43,760 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:43,760 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-11 00:34:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 313. [2022-02-11 00:34:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9583333333333335) internal successors, (923), 312 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 923 transitions. [2022-02-11 00:34:43,764 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 923 transitions. Word has length 22 [2022-02-11 00:34:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:43,764 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 923 transitions. [2022-02-11 00:34:43,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 923 transitions. [2022-02-11 00:34:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:43,765 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:43,765 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:43,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-11 00:34:43,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-11 00:34:43,980 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:43,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1255511653, now seen corresponding path program 112 times [2022-02-11 00:34:43,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:43,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681477832] [2022-02-11 00:34:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:43,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:44,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:44,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681477832] [2022-02-11 00:34:44,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681477832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:44,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437582421] [2022-02-11 00:34:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:44,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:44,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:44,056 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:44,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-11 00:34:44,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:44,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:44,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:44,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:34:44,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:34:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:44,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:44,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:44,693 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:44,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:44,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:44,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437582421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:44,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:44,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:44,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202871336] [2022-02-11 00:34:44,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:44,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:44,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:44,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:44,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:44,700 INFO L87 Difference]: Start difference. First operand 313 states and 923 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:44,999 INFO L93 Difference]: Finished difference Result 595 states and 1725 transitions. [2022-02-11 00:34:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:34:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:45,000 INFO L225 Difference]: With dead ends: 595 [2022-02-11 00:34:45,000 INFO L226 Difference]: Without dead ends: 595 [2022-02-11 00:34:45,000 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:34:45,000 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:45,000 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 206 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-11 00:34:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 323. [2022-02-11 00:34:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.012422360248447) internal successors, (970), 322 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 970 transitions. [2022-02-11 00:34:45,005 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 970 transitions. Word has length 22 [2022-02-11 00:34:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:45,005 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 970 transitions. [2022-02-11 00:34:45,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 970 transitions. [2022-02-11 00:34:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:45,006 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:45,006 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:45,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-11 00:34:45,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:45,224 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1544852679, now seen corresponding path program 113 times [2022-02-11 00:34:45,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:45,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862079511] [2022-02-11 00:34:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:45,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:45,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:45,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862079511] [2022-02-11 00:34:45,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862079511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:45,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994370951] [2022-02-11 00:34:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:45,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:45,283 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:45,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-11 00:34:45,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:45,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:45,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:45,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:34:45,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:34:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:45,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:45,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:45,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:45,940 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:45,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:45,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:45,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994370951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:45,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:45,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:45,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107221006] [2022-02-11 00:34:45,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:45,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:45,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:45,947 INFO L87 Difference]: Start difference. First operand 323 states and 970 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:46,514 INFO L93 Difference]: Finished difference Result 642 states and 1842 transitions. [2022-02-11 00:34:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:46,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:46,515 INFO L225 Difference]: With dead ends: 642 [2022-02-11 00:34:46,515 INFO L226 Difference]: Without dead ends: 632 [2022-02-11 00:34:46,515 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:34:46,515 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 233 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:46,515 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 249 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-11 00:34:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 330. [2022-02-11 00:34:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2022-02-11 00:34:46,519 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 22 [2022-02-11 00:34:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:46,520 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2022-02-11 00:34:46,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2022-02-11 00:34:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:46,520 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:46,520 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:46,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:46,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:46,736 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash -503777487, now seen corresponding path program 114 times [2022-02-11 00:34:46,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:46,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473093689] [2022-02-11 00:34:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:46,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:46,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:46,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473093689] [2022-02-11 00:34:46,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473093689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:46,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73524027] [2022-02-11 00:34:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:46,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:46,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:46,827 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:46,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-11 00:34:46,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:34:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:47,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:47,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:34:47,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:34:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:47,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:47,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:47,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:47,558 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:47,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:47,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:47,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73524027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:47,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:47,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:47,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749496480] [2022-02-11 00:34:47,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:47,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:47,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:47,565 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:47,910 INFO L93 Difference]: Finished difference Result 603 states and 1720 transitions. [2022-02-11 00:34:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:47,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:47,911 INFO L225 Difference]: With dead ends: 603 [2022-02-11 00:34:47,911 INFO L226 Difference]: Without dead ends: 603 [2022-02-11 00:34:47,912 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:34:47,912 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:47,912 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 175 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-11 00:34:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 321. [2022-02-11 00:34:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.996875) internal successors, (959), 320 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 959 transitions. [2022-02-11 00:34:47,916 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 959 transitions. Word has length 22 [2022-02-11 00:34:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:47,916 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 959 transitions. [2022-02-11 00:34:47,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 959 transitions. [2022-02-11 00:34:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:47,917 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:47,917 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:47,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-11 00:34:48,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:48,118 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1714360505, now seen corresponding path program 115 times [2022-02-11 00:34:48,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:48,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951203340] [2022-02-11 00:34:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:48,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:48,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:48,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951203340] [2022-02-11 00:34:48,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951203340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:48,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259495960] [2022-02-11 00:34:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:48,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:48,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:48,191 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:48,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-11 00:34:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:48,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:48,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:34:48,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:34:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:48,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:48,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:48,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:48,992 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:48,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:48,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:48,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259495960] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:48,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:48,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:48,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908019907] [2022-02-11 00:34:48,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:48,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:48,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:49,000 INFO L87 Difference]: Start difference. First operand 321 states and 959 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:49,345 INFO L93 Difference]: Finished difference Result 547 states and 1570 transitions. [2022-02-11 00:34:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:49,346 INFO L225 Difference]: With dead ends: 547 [2022-02-11 00:34:49,346 INFO L226 Difference]: Without dead ends: 538 [2022-02-11 00:34:49,346 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:34:49,347 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:49,347 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 209 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-11 00:34:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 327. [2022-02-11 00:34:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.978527607361963) internal successors, (971), 326 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 971 transitions. [2022-02-11 00:34:49,351 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 971 transitions. Word has length 22 [2022-02-11 00:34:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:49,351 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 971 transitions. [2022-02-11 00:34:49,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 971 transitions. [2022-02-11 00:34:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:49,352 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:49,352 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:49,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:49,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-11 00:34:49,563 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2056609999, now seen corresponding path program 116 times [2022-02-11 00:34:49,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:49,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477318290] [2022-02-11 00:34:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:49,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:49,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:49,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477318290] [2022-02-11 00:34:49,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477318290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:49,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700980231] [2022-02-11 00:34:49,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:49,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:49,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:49,629 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:49,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-11 00:34:49,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:49,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:49,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:34:49,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:34:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:50,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:50,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:50,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:50,228 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:50,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:50,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:50,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700980231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:50,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:50,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:34:50,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023174148] [2022-02-11 00:34:50,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:50,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:34:50,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:34:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:34:50,234 INFO L87 Difference]: Start difference. First operand 327 states and 971 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:50,724 INFO L93 Difference]: Finished difference Result 640 states and 1787 transitions. [2022-02-11 00:34:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:34:50,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:50,725 INFO L225 Difference]: With dead ends: 640 [2022-02-11 00:34:50,725 INFO L226 Difference]: Without dead ends: 630 [2022-02-11 00:34:50,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:34:50,726 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 199 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:50,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 205 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-11 00:34:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 349. [2022-02-11 00:34:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9741379310344827) internal successors, (1035), 348 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1035 transitions. [2022-02-11 00:34:50,730 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1035 transitions. Word has length 22 [2022-02-11 00:34:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:50,730 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1035 transitions. [2022-02-11 00:34:50,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1035 transitions. [2022-02-11 00:34:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:50,731 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:50,731 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:50,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-02-11 00:34:50,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-11 00:34:50,939 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash 475838083, now seen corresponding path program 117 times [2022-02-11 00:34:50,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:50,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423549899] [2022-02-11 00:34:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:50,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:50,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423549899] [2022-02-11 00:34:50,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423549899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:50,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701848221] [2022-02-11 00:34:50,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:50,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:51,000 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:51,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-11 00:34:51,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:34:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:51,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:51,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:34:51,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:34:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:51,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:51,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:51,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:51,593 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:51,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:51,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:51,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701848221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:51,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:51,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:34:51,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655248360] [2022-02-11 00:34:51,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:51,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:34:51,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:34:51,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:34:51,598 INFO L87 Difference]: Start difference. First operand 349 states and 1035 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:51,869 INFO L93 Difference]: Finished difference Result 597 states and 1676 transitions. [2022-02-11 00:34:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:34:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:51,870 INFO L225 Difference]: With dead ends: 597 [2022-02-11 00:34:51,871 INFO L226 Difference]: Without dead ends: 585 [2022-02-11 00:34:51,871 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:34:51,871 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:51,871 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 209 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-02-11 00:34:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 329. [2022-02-11 00:34:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2022-02-11 00:34:51,876 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 22 [2022-02-11 00:34:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:51,876 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2022-02-11 00:34:51,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2022-02-11 00:34:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:51,876 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:51,876 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:51,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:52,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-11 00:34:52,091 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1854643641, now seen corresponding path program 118 times [2022-02-11 00:34:52,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:52,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028141297] [2022-02-11 00:34:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:52,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:52,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:52,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028141297] [2022-02-11 00:34:52,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028141297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:52,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973587011] [2022-02-11 00:34:52,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:52,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:52,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:52,201 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:52,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-11 00:34:52,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:52,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:52,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:52,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:52,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:52,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:52,857 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:52,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:52,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:52,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973587011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:52,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:52,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:52,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579600591] [2022-02-11 00:34:52,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:52,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:52,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:52,862 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:53,129 INFO L93 Difference]: Finished difference Result 465 states and 1359 transitions. [2022-02-11 00:34:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:53,129 INFO L225 Difference]: With dead ends: 465 [2022-02-11 00:34:53,130 INFO L226 Difference]: Without dead ends: 445 [2022-02-11 00:34:53,130 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:34:53,130 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:53,130 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 159 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-11 00:34:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 335. [2022-02-11 00:34:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9580838323353293) internal successors, (988), 334 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 988 transitions. [2022-02-11 00:34:53,143 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 988 transitions. Word has length 22 [2022-02-11 00:34:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:53,143 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 988 transitions. [2022-02-11 00:34:53,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 988 transitions. [2022-02-11 00:34:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:53,143 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:53,143 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:53,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-11 00:34:53,360 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash 95354501, now seen corresponding path program 119 times [2022-02-11 00:34:53,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:53,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179033713] [2022-02-11 00:34:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:53,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:53,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:53,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179033713] [2022-02-11 00:34:53,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179033713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:53,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820457491] [2022-02-11 00:34:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:34:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:53,413 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:53,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-11 00:34:53,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:34:53,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:53,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:53,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-02-11 00:34:53,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-11 00:34:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:53,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:53,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:53,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:34:54,035 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:54,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:54,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:54,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820457491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:54,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:54,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:34:54,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160366848] [2022-02-11 00:34:54,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:34:54,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:34:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:34:54,043 INFO L87 Difference]: Start difference. First operand 335 states and 988 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:54,505 INFO L93 Difference]: Finished difference Result 543 states and 1537 transitions. [2022-02-11 00:34:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:34:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:54,506 INFO L225 Difference]: With dead ends: 543 [2022-02-11 00:34:54,506 INFO L226 Difference]: Without dead ends: 533 [2022-02-11 00:34:54,506 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:34:54,506 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:54,506 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 251 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:34:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-02-11 00:34:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 357. [2022-02-11 00:34:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2022-02-11 00:34:54,511 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2022-02-11 00:34:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:54,511 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2022-02-11 00:34:54,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2022-02-11 00:34:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:54,511 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:54,511 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:54,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-11 00:34:54,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-02-11 00:34:54,728 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1485417415, now seen corresponding path program 120 times [2022-02-11 00:34:54,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:54,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738327597] [2022-02-11 00:34:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:54,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:54,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738327597] [2022-02-11 00:34:54,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738327597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:54,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286516691] [2022-02-11 00:34:54,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:34:54,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:54,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:54,782 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:54,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-11 00:34:54,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:34:54,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:55,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:34:55,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-02-11 00:34:55,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-11 00:34:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:55,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:55,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:55,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:34:55,254 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:55,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:55,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:55,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286516691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:55,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:55,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:34:55,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395852028] [2022-02-11 00:34:55,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:55,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:34:55,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:34:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:34:55,260 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:55,488 INFO L93 Difference]: Finished difference Result 500 states and 1426 transitions. [2022-02-11 00:34:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:55,489 INFO L225 Difference]: With dead ends: 500 [2022-02-11 00:34:55,489 INFO L226 Difference]: Without dead ends: 485 [2022-02-11 00:34:55,489 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:34:55,489 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:55,489 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 185 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:34:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-11 00:34:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 331. [2022-02-11 00:34:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2022-02-11 00:34:55,493 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2022-02-11 00:34:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:55,493 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2022-02-11 00:34:55,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2022-02-11 00:34:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:55,494 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:55,494 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:55,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-11 00:34:55,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:55,702 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1434517723, now seen corresponding path program 121 times [2022-02-11 00:34:55,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:55,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956371274] [2022-02-11 00:34:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:55,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:55,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:55,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956371274] [2022-02-11 00:34:55,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956371274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:55,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620708644] [2022-02-11 00:34:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:34:55,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:55,778 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-11 00:34:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:55,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:55,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:56,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:56,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:56,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:56,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:56,256 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:56,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:56,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:56,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620708644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:56,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:56,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:56,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021667601] [2022-02-11 00:34:56,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:56,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:56,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:56,261 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:56,509 INFO L93 Difference]: Finished difference Result 460 states and 1324 transitions. [2022-02-11 00:34:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:56,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:56,509 INFO L225 Difference]: With dead ends: 460 [2022-02-11 00:34:56,509 INFO L226 Difference]: Without dead ends: 460 [2022-02-11 00:34:56,510 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:34:56,510 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:56,510 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 241 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-02-11 00:34:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 334. [2022-02-11 00:34:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.951951951951952) internal successors, (983), 333 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 983 transitions. [2022-02-11 00:34:56,514 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 983 transitions. Word has length 22 [2022-02-11 00:34:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:56,514 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 983 transitions. [2022-02-11 00:34:56,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 983 transitions. [2022-02-11 00:34:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:56,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:56,514 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:56,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:56,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:56,731 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1365846609, now seen corresponding path program 122 times [2022-02-11 00:34:56,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:56,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853883688] [2022-02-11 00:34:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:56,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:56,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853883688] [2022-02-11 00:34:56,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853883688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:56,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531438977] [2022-02-11 00:34:56,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:34:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:56,798 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:56,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-11 00:34:56,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:34:56,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:56,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:57,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:34:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:57,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:57,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:57,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:57,479 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:57,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:57,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:57,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531438977] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:57,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:57,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:57,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330157262] [2022-02-11 00:34:57,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:57,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:57,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:57,486 INFO L87 Difference]: Start difference. First operand 334 states and 983 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:57,839 INFO L93 Difference]: Finished difference Result 487 states and 1388 transitions. [2022-02-11 00:34:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:57,840 INFO L225 Difference]: With dead ends: 487 [2022-02-11 00:34:57,840 INFO L226 Difference]: Without dead ends: 477 [2022-02-11 00:34:57,840 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:34:57,841 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:57,841 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 186 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-11 00:34:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 331. [2022-02-11 00:34:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9424242424242424) internal successors, (971), 330 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 971 transitions. [2022-02-11 00:34:57,845 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 971 transitions. Word has length 22 [2022-02-11 00:34:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:57,845 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 971 transitions. [2022-02-11 00:34:57,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 971 transitions. [2022-02-11 00:34:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:57,845 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:57,845 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:57,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:58,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:58,055 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash -940899399, now seen corresponding path program 123 times [2022-02-11 00:34:58,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:58,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68595219] [2022-02-11 00:34:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:58,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:58,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:58,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68595219] [2022-02-11 00:34:58,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68595219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:58,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417973894] [2022-02-11 00:34:58,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:34:58,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:58,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:58,164 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:58,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-11 00:34:58,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:34:58,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:58,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:58,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:58,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:34:58,847 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:58,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:58,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:58,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417973894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:58,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:58,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:34:58,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395786007] [2022-02-11 00:34:58,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:58,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:34:58,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:34:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:34:58,856 INFO L87 Difference]: Start difference. First operand 331 states and 971 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:34:59,124 INFO L93 Difference]: Finished difference Result 438 states and 1272 transitions. [2022-02-11 00:34:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:34:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:34:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:34:59,125 INFO L225 Difference]: With dead ends: 438 [2022-02-11 00:34:59,125 INFO L226 Difference]: Without dead ends: 418 [2022-02-11 00:34:59,125 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:34:59,125 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:34:59,125 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 217 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:34:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-11 00:34:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 313. [2022-02-11 00:34:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9455128205128207) internal successors, (919), 312 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 919 transitions. [2022-02-11 00:34:59,128 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 919 transitions. Word has length 22 [2022-02-11 00:34:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:34:59,129 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 919 transitions. [2022-02-11 00:34:59,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:34:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 919 transitions. [2022-02-11 00:34:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:34:59,129 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:34:59,129 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:34:59,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-11 00:34:59,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:59,346 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:34:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:34:59,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1398909669, now seen corresponding path program 124 times [2022-02-11 00:34:59,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:34:59,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402634953] [2022-02-11 00:34:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:34:59,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:34:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:34:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:59,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:34:59,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402634953] [2022-02-11 00:34:59,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402634953] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:34:59,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002118783] [2022-02-11 00:34:59,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:34:59,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:34:59,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:34:59,404 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:34:59,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-11 00:34:59,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:34:59,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:34:59,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:34:59,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:34:59,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:34:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:59,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:34:59,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:34:59,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:34:59,793 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:34:59,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:34:59,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:34:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:34:59,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002118783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:34:59,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:34:59,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:34:59,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504200278] [2022-02-11 00:34:59,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:34:59,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:34:59,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:34:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:34:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:34:59,797 INFO L87 Difference]: Start difference. First operand 313 states and 919 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:00,010 INFO L93 Difference]: Finished difference Result 519 states and 1508 transitions. [2022-02-11 00:35:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:35:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:00,012 INFO L225 Difference]: With dead ends: 519 [2022-02-11 00:35:00,012 INFO L226 Difference]: Without dead ends: 519 [2022-02-11 00:35:00,012 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:00,012 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:00,012 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 164 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:35:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-02-11 00:35:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 325. [2022-02-11 00:35:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.984567901234568) internal successors, (967), 324 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 967 transitions. [2022-02-11 00:35:00,016 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 967 transitions. Word has length 22 [2022-02-11 00:35:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:00,016 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 967 transitions. [2022-02-11 00:35:00,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 967 transitions. [2022-02-11 00:35:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:00,017 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:00,017 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:00,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:00,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:00,233 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1401454663, now seen corresponding path program 125 times [2022-02-11 00:35:00,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:00,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135786726] [2022-02-11 00:35:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:00,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:00,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135786726] [2022-02-11 00:35:00,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135786726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:00,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142161192] [2022-02-11 00:35:00,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:00,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:00,288 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:00,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-11 00:35:00,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:35:00,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:00,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:00,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:35:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:00,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:00,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:00,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-11 00:35:00,693 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:00,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:00,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:00,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142161192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:00,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:00,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:00,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420730151] [2022-02-11 00:35:00,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:00,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:00,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:00,698 INFO L87 Difference]: Start difference. First operand 325 states and 967 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:00,936 INFO L93 Difference]: Finished difference Result 491 states and 1422 transitions. [2022-02-11 00:35:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:35:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:00,936 INFO L225 Difference]: With dead ends: 491 [2022-02-11 00:35:00,936 INFO L226 Difference]: Without dead ends: 481 [2022-02-11 00:35:00,937 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:00,937 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:00,937 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 202 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-02-11 00:35:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 332. [2022-02-11 00:35:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9637462235649545) internal successors, (981), 331 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 981 transitions. [2022-02-11 00:35:00,941 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 981 transitions. Word has length 22 [2022-02-11 00:35:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:00,941 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 981 transitions. [2022-02-11 00:35:00,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 981 transitions. [2022-02-11 00:35:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:00,941 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:00,941 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:00,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:01,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:01,158 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1720566983, now seen corresponding path program 126 times [2022-02-11 00:35:01,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:01,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520980548] [2022-02-11 00:35:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:01,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:01,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:01,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520980548] [2022-02-11 00:35:01,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520980548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:01,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108713832] [2022-02-11 00:35:01,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:01,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:01,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:01,239 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:01,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-11 00:35:01,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:35:01,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:01,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:01,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:01,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:01,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:01,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:01,659 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:01,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:01,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:01,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108713832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:01,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:01,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:01,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268023342] [2022-02-11 00:35:01,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:01,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:01,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:01,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:01,664 INFO L87 Difference]: Start difference. First operand 332 states and 981 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:01,890 INFO L93 Difference]: Finished difference Result 419 states and 1236 transitions. [2022-02-11 00:35:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:01,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:01,891 INFO L225 Difference]: With dead ends: 419 [2022-02-11 00:35:01,891 INFO L226 Difference]: Without dead ends: 419 [2022-02-11 00:35:01,891 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:01,892 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:01,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 211 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-11 00:35:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 310. [2022-02-11 00:35:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2022-02-11 00:35:01,895 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 22 [2022-02-11 00:35:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:01,895 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2022-02-11 00:35:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2022-02-11 00:35:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:01,896 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:01,896 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:01,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-11 00:35:02,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:02,113 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:02,113 INFO L85 PathProgramCache]: Analyzing trace with hash -88220487, now seen corresponding path program 127 times [2022-02-11 00:35:02,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:02,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747852422] [2022-02-11 00:35:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:02,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:02,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:02,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747852422] [2022-02-11 00:35:02,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747852422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:02,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253362079] [2022-02-11 00:35:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:02,189 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:02,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-11 00:35:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:02,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:02,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:35:02,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:35:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:02,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:02,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:02,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:02,784 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:02,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:02,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:02,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253362079] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:02,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:02,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:02,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006157434] [2022-02-11 00:35:02,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:02,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:02,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:02,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:02,791 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:03,126 INFO L93 Difference]: Finished difference Result 600 states and 1741 transitions. [2022-02-11 00:35:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:35:03,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:03,127 INFO L225 Difference]: With dead ends: 600 [2022-02-11 00:35:03,127 INFO L226 Difference]: Without dead ends: 600 [2022-02-11 00:35:03,127 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:35:03,127 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 212 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:03,127 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 172 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-11 00:35:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 324. [2022-02-11 00:35:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.0123839009287927) internal successors, (973), 323 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 973 transitions. [2022-02-11 00:35:03,131 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 973 transitions. Word has length 22 [2022-02-11 00:35:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:03,131 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 973 transitions. [2022-02-11 00:35:03,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 973 transitions. [2022-02-11 00:35:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:03,133 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:03,133 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:03,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-02-11 00:35:03,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-11 00:35:03,350 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1406382477, now seen corresponding path program 128 times [2022-02-11 00:35:03,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:03,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502857235] [2022-02-11 00:35:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:03,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:03,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502857235] [2022-02-11 00:35:03,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502857235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:03,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115532274] [2022-02-11 00:35:03,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:03,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:03,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:03,431 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:03,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-11 00:35:03,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:03,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:03,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:03,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:03,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:35:03,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:35:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:03,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:03,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:03,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:03,987 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:03,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:03,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:03,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115532274] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:03,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:03,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:03,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018466699] [2022-02-11 00:35:03,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:03,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:03,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:03,994 INFO L87 Difference]: Start difference. First operand 324 states and 973 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:04,401 INFO L93 Difference]: Finished difference Result 615 states and 1762 transitions. [2022-02-11 00:35:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:35:04,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:04,402 INFO L225 Difference]: With dead ends: 615 [2022-02-11 00:35:04,402 INFO L226 Difference]: Without dead ends: 605 [2022-02-11 00:35:04,402 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:04,402 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:04,403 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 232 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-11 00:35:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 331. [2022-02-11 00:35:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9909090909090907) internal successors, (987), 330 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 987 transitions. [2022-02-11 00:35:04,407 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 987 transitions. Word has length 22 [2022-02-11 00:35:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:04,407 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 987 transitions. [2022-02-11 00:35:04,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 987 transitions. [2022-02-11 00:35:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:04,407 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:04,407 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:04,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:04,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-11 00:35:04,621 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1847509627, now seen corresponding path program 129 times [2022-02-11 00:35:04,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:04,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799753952] [2022-02-11 00:35:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:04,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:04,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:04,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799753952] [2022-02-11 00:35:04,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799753952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:04,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145974227] [2022-02-11 00:35:04,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:04,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:04,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:04,689 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:04,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-11 00:35:04,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:35:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:04,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:04,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:35:04,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:35:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:05,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:05,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:05,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:05,233 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:05,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:05,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:05,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145974227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:05,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:05,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:05,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844964160] [2022-02-11 00:35:05,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:05,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:05,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:05,237 INFO L87 Difference]: Start difference. First operand 331 states and 987 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:05,602 INFO L93 Difference]: Finished difference Result 684 states and 1957 transitions. [2022-02-11 00:35:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:35:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:05,603 INFO L225 Difference]: With dead ends: 684 [2022-02-11 00:35:05,603 INFO L226 Difference]: Without dead ends: 684 [2022-02-11 00:35:05,604 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:35:05,604 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 188 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:05,604 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 226 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-11 00:35:05,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 337. [2022-02-11 00:35:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.017857142857143) internal successors, (1014), 336 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1014 transitions. [2022-02-11 00:35:05,608 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1014 transitions. Word has length 22 [2022-02-11 00:35:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:05,608 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1014 transitions. [2022-02-11 00:35:05,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1014 transitions. [2022-02-11 00:35:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:05,609 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:05,609 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:05,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:05,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-11 00:35:05,825 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash 370628365, now seen corresponding path program 130 times [2022-02-11 00:35:05,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:05,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603351447] [2022-02-11 00:35:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:05,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:05,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603351447] [2022-02-11 00:35:05,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603351447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:05,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861652846] [2022-02-11 00:35:05,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:35:05,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:05,881 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:05,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-11 00:35:06,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:35:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:06,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:06,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:35:06,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:35:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:06,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:06,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:06,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:06,342 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:06,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:06,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:06,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861652846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:06,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:06,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:06,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641974668] [2022-02-11 00:35:06,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:06,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:06,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:06,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:06,347 INFO L87 Difference]: Start difference. First operand 337 states and 1014 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:06,594 INFO L93 Difference]: Finished difference Result 628 states and 1807 transitions. [2022-02-11 00:35:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:35:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:06,595 INFO L225 Difference]: With dead ends: 628 [2022-02-11 00:35:06,596 INFO L226 Difference]: Without dead ends: 619 [2022-02-11 00:35:06,596 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:06,596 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 170 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:06,596 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 171 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-11 00:35:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 343. [2022-02-11 00:35:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0) internal successors, (1026), 342 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1026 transitions. [2022-02-11 00:35:06,602 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1026 transitions. Word has length 22 [2022-02-11 00:35:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:06,603 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1026 transitions. [2022-02-11 00:35:06,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1026 transitions. [2022-02-11 00:35:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:06,603 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:06,603 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:06,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:06,819 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 712877859, now seen corresponding path program 131 times [2022-02-11 00:35:06,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:06,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592971576] [2022-02-11 00:35:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:06,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:06,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592971576] [2022-02-11 00:35:06,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592971576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:06,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331029426] [2022-02-11 00:35:06,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:06,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:06,912 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:06,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-11 00:35:07,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:35:07,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:07,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:07,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:35:07,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:35:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:07,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:07,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:07,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-11 00:35:07,379 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:07,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:07,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:07,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331029426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:07,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:07,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:35:07,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490945545] [2022-02-11 00:35:07,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:07,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:35:07,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:35:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:35:07,383 INFO L87 Difference]: Start difference. First operand 343 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:07,668 INFO L93 Difference]: Finished difference Result 667 states and 1877 transitions. [2022-02-11 00:35:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:35:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:07,669 INFO L225 Difference]: With dead ends: 667 [2022-02-11 00:35:07,669 INFO L226 Difference]: Without dead ends: 657 [2022-02-11 00:35:07,669 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:07,669 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 199 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:07,669 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 212 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-02-11 00:35:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 355. [2022-02-11 00:35:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.005649717514124) internal successors, (1064), 354 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1064 transitions. [2022-02-11 00:35:07,674 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1064 transitions. Word has length 22 [2022-02-11 00:35:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:07,674 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1064 transitions. [2022-02-11 00:35:07,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1064 transitions. [2022-02-11 00:35:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:07,674 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:07,675 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:07,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:07,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-02-11 00:35:07,887 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash -867894057, now seen corresponding path program 132 times [2022-02-11 00:35:07,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:07,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921657135] [2022-02-11 00:35:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:07,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:07,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921657135] [2022-02-11 00:35:07,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921657135] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:07,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259046080] [2022-02-11 00:35:07,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:07,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:07,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:07,979 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:07,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-11 00:35:08,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:35:08,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:08,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:08,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:08,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:35:08,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:35:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:08,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:08,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-11 00:35:08,525 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:08,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:08,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:08,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259046080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:08,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:08,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:35:08,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032088732] [2022-02-11 00:35:08,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:08,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:35:08,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:35:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:35:08,531 INFO L87 Difference]: Start difference. First operand 355 states and 1064 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:08,894 INFO L93 Difference]: Finished difference Result 581 states and 1669 transitions. [2022-02-11 00:35:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:35:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:08,895 INFO L225 Difference]: With dead ends: 581 [2022-02-11 00:35:08,895 INFO L226 Difference]: Without dead ends: 569 [2022-02-11 00:35:08,895 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:35:08,895 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:08,896 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 194 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-02-11 00:35:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 351. [2022-02-11 00:35:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.005714285714286) internal successors, (1052), 350 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1052 transitions. [2022-02-11 00:35:08,900 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1052 transitions. Word has length 22 [2022-02-11 00:35:08,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:08,900 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1052 transitions. [2022-02-11 00:35:08,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1052 transitions. [2022-02-11 00:35:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:08,900 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:08,901 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:08,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:09,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:09,111 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1148998577, now seen corresponding path program 133 times [2022-02-11 00:35:09,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:09,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549688796] [2022-02-11 00:35:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:09,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:09,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549688796] [2022-02-11 00:35:09,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549688796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:09,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976691324] [2022-02-11 00:35:09,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:09,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:09,196 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:09,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-11 00:35:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:09,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:09,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-02-11 00:35:09,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-02-11 00:35:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:09,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:09,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:09,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:09,668 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:09,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:09,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:09,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976691324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:09,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:09,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:09,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092944662] [2022-02-11 00:35:09,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:09,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:09,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:09,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:09,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:09,673 INFO L87 Difference]: Start difference. First operand 351 states and 1052 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:09,933 INFO L93 Difference]: Finished difference Result 559 states and 1621 transitions. [2022-02-11 00:35:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:35:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:09,934 INFO L225 Difference]: With dead ends: 559 [2022-02-11 00:35:09,934 INFO L226 Difference]: Without dead ends: 559 [2022-02-11 00:35:09,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:35:09,934 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 186 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:09,934 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 205 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-02-11 00:35:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 356. [2022-02-11 00:35:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.0) internal successors, (1065), 355 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1065 transitions. [2022-02-11 00:35:09,939 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1065 transitions. Word has length 22 [2022-02-11 00:35:09,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:09,939 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1065 transitions. [2022-02-11 00:35:09,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1065 transitions. [2022-02-11 00:35:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:09,939 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:09,939 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:09,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:10,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:10,151 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash 345604387, now seen corresponding path program 134 times [2022-02-11 00:35:10,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:10,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950813743] [2022-02-11 00:35:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:10,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:10,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:10,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950813743] [2022-02-11 00:35:10,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950813743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:10,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925994564] [2022-02-11 00:35:10,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:10,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:10,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:10,218 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:10,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-11 00:35:10,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:10,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:10,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:10,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-02-11 00:35:10,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-02-11 00:35:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:10,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:10,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:10,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:10,758 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:10,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:10,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:10,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925994564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:10,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:10,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:10,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875351984] [2022-02-11 00:35:10,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:10,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:10,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:10,763 INFO L87 Difference]: Start difference. First operand 356 states and 1065 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:10,993 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2022-02-11 00:35:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:35:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:10,994 INFO L225 Difference]: With dead ends: 531 [2022-02-11 00:35:10,994 INFO L226 Difference]: Without dead ends: 521 [2022-02-11 00:35:10,994 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:35:10,996 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:10,996 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 215 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-11 00:35:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 335. [2022-02-11 00:35:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.970059880239521) internal successors, (992), 334 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 992 transitions. [2022-02-11 00:35:11,000 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 992 transitions. Word has length 22 [2022-02-11 00:35:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:11,000 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 992 transitions. [2022-02-11 00:35:11,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 992 transitions. [2022-02-11 00:35:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:11,000 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:11,000 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:11,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:11,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:11,217 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:11,217 INFO L85 PathProgramCache]: Analyzing trace with hash -180315899, now seen corresponding path program 135 times [2022-02-11 00:35:11,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:11,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471376794] [2022-02-11 00:35:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:11,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:11,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:11,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471376794] [2022-02-11 00:35:11,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471376794] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:11,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215392701] [2022-02-11 00:35:11,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:11,304 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:11,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-11 00:35:11,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:35:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:11,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:11,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:11,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:11,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:11,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:11,787 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:11,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:11,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:11,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215392701] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:11,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:11,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:11,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734167496] [2022-02-11 00:35:11,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:11,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:11,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:11,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:11,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:11,792 INFO L87 Difference]: Start difference. First operand 335 states and 992 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:12,042 INFO L93 Difference]: Finished difference Result 464 states and 1374 transitions. [2022-02-11 00:35:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:12,043 INFO L225 Difference]: With dead ends: 464 [2022-02-11 00:35:12,043 INFO L226 Difference]: Without dead ends: 464 [2022-02-11 00:35:12,043 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:12,043 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:12,043 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 226 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-11 00:35:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 332. [2022-02-11 00:35:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9697885196374623) internal successors, (983), 331 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 983 transitions. [2022-02-11 00:35:12,047 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 983 transitions. Word has length 22 [2022-02-11 00:35:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:12,047 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 983 transitions. [2022-02-11 00:35:12,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 983 transitions. [2022-02-11 00:35:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:12,048 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:12,048 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:12,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:12,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:12,264 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash 325901489, now seen corresponding path program 136 times [2022-02-11 00:35:12,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:12,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111463597] [2022-02-11 00:35:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:12,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:12,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:12,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111463597] [2022-02-11 00:35:12,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111463597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:12,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778620255] [2022-02-11 00:35:12,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:35:12,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:12,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:12,344 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:12,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-11 00:35:12,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:35:12,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:12,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:12,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:35:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:12,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:12,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:12,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:12,841 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:12,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:12,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:12,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778620255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:12,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:12,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:12,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752245219] [2022-02-11 00:35:12,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:12,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:12,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:12,846 INFO L87 Difference]: Start difference. First operand 332 states and 983 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:13,133 INFO L93 Difference]: Finished difference Result 513 states and 1468 transitions. [2022-02-11 00:35:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:35:13,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:13,133 INFO L225 Difference]: With dead ends: 513 [2022-02-11 00:35:13,134 INFO L226 Difference]: Without dead ends: 513 [2022-02-11 00:35:13,134 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:35:13,134 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:13,134 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 217 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-02-11 00:35:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 340. [2022-02-11 00:35:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.982300884955752) internal successors, (1011), 339 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1011 transitions. [2022-02-11 00:35:13,138 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1011 transitions. Word has length 22 [2022-02-11 00:35:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:13,138 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1011 transitions. [2022-02-11 00:35:13,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1011 transitions. [2022-02-11 00:35:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:13,139 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:13,139 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:13,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:13,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-02-11 00:35:13,355 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:13,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1750927815, now seen corresponding path program 137 times [2022-02-11 00:35:13,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:13,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518367655] [2022-02-11 00:35:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:13,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:13,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:13,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518367655] [2022-02-11 00:35:13,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518367655] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:13,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352733731] [2022-02-11 00:35:13,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:13,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:13,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:13,419 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:13,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-11 00:35:13,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:35:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:13,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:13,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-02-11 00:35:13,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:35:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:13,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:13,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:13,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-11 00:35:13,881 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:13,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:13,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:13,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352733731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:13,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:13,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:13,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202997258] [2022-02-11 00:35:13,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:13,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:13,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:13,885 INFO L87 Difference]: Start difference. First operand 340 states and 1011 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:14,132 INFO L93 Difference]: Finished difference Result 487 states and 1400 transitions. [2022-02-11 00:35:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:14,133 INFO L225 Difference]: With dead ends: 487 [2022-02-11 00:35:14,133 INFO L226 Difference]: Without dead ends: 478 [2022-02-11 00:35:14,133 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:14,133 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:14,133 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-02-11 00:35:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 340. [2022-02-11 00:35:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9528023598820057) internal successors, (1001), 339 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1001 transitions. [2022-02-11 00:35:14,137 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1001 transitions. Word has length 22 [2022-02-11 00:35:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:14,137 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1001 transitions. [2022-02-11 00:35:14,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1001 transitions. [2022-02-11 00:35:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:14,137 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:14,138 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:14,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:14,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-11 00:35:14,339 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1786527141, now seen corresponding path program 138 times [2022-02-11 00:35:14,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:14,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877846820] [2022-02-11 00:35:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:14,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:14,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877846820] [2022-02-11 00:35:14,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877846820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:14,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637002418] [2022-02-11 00:35:14,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:14,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:14,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:14,431 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:14,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-11 00:35:14,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:35:14,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:14,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:14,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:35:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:14,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:14,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:14,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:14,926 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:14,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:14,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:14,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637002418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:14,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:14,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:14,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041892316] [2022-02-11 00:35:14,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:14,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:14,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:14,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:14,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:14,930 INFO L87 Difference]: Start difference. First operand 340 states and 1001 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:15,166 INFO L93 Difference]: Finished difference Result 423 states and 1248 transitions. [2022-02-11 00:35:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:15,167 INFO L225 Difference]: With dead ends: 423 [2022-02-11 00:35:15,167 INFO L226 Difference]: Without dead ends: 423 [2022-02-11 00:35:15,167 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:15,168 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 96 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:15,168 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 198 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-11 00:35:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 309. [2022-02-11 00:35:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-02-11 00:35:15,171 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-02-11 00:35:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:15,171 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-02-11 00:35:15,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-02-11 00:35:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:15,187 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:15,187 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:15,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-11 00:35:15,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-11 00:35:15,387 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1957780507, now seen corresponding path program 139 times [2022-02-11 00:35:15,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:15,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517672782] [2022-02-11 00:35:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:15,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:15,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:15,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517672782] [2022-02-11 00:35:15,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517672782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:15,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891147453] [2022-02-11 00:35:15,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:15,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:15,439 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:15,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-11 00:35:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:15,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:15,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:15,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:35:15,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:35:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:15,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:15,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:15,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:15,974 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:15,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:15,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:15,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891147453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:15,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:15,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:15,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689105180] [2022-02-11 00:35:15,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:15,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:15,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:15,979 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:16,265 INFO L93 Difference]: Finished difference Result 735 states and 2141 transitions. [2022-02-11 00:35:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:16,267 INFO L225 Difference]: With dead ends: 735 [2022-02-11 00:35:16,267 INFO L226 Difference]: Without dead ends: 735 [2022-02-11 00:35:16,267 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:16,267 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 219 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:16,267 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 214 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-02-11 00:35:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 329. [2022-02-11 00:35:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2022-02-11 00:35:16,272 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2022-02-11 00:35:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:16,272 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2022-02-11 00:35:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2022-02-11 00:35:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:16,272 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:16,272 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:16,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:16,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-11 00:35:16,489 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:16,489 INFO L85 PathProgramCache]: Analyzing trace with hash -463177543, now seen corresponding path program 140 times [2022-02-11 00:35:16,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:16,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487268405] [2022-02-11 00:35:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:16,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:16,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487268405] [2022-02-11 00:35:16,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487268405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:16,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835398256] [2022-02-11 00:35:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:16,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:16,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:16,549 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:16,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-11 00:35:16,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:16,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:16,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:35:16,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:35:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:17,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:17,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:17,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:17,194 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:17,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:17,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:17,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835398256] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:17,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:17,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:17,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363756281] [2022-02-11 00:35:17,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:17,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:17,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:17,198 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:17,577 INFO L93 Difference]: Finished difference Result 758 states and 2196 transitions. [2022-02-11 00:35:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:35:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:17,578 INFO L225 Difference]: With dead ends: 758 [2022-02-11 00:35:17,578 INFO L226 Difference]: Without dead ends: 748 [2022-02-11 00:35:17,578 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:35:17,578 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 273 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:17,578 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 191 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-11 00:35:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 326. [2022-02-11 00:35:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0) internal successors, (975), 325 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 975 transitions. [2022-02-11 00:35:17,599 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 975 transitions. Word has length 22 [2022-02-11 00:35:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:17,600 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 975 transitions. [2022-02-11 00:35:17,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 975 transitions. [2022-02-11 00:35:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:17,600 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:17,600 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:17,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:17,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-11 00:35:17,818 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -38230333, now seen corresponding path program 141 times [2022-02-11 00:35:17,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:17,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591968562] [2022-02-11 00:35:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:17,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:17,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:17,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591968562] [2022-02-11 00:35:17,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591968562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:17,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628686982] [2022-02-11 00:35:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:17,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:17,900 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:17,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-11 00:35:18,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:35:18,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:18,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:18,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:18,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:18,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:18,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:18,656 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:18,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:18,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:18,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628686982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:18,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:18,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:18,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700012163] [2022-02-11 00:35:18,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:18,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:18,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:18,663 INFO L87 Difference]: Start difference. First operand 326 states and 975 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:19,138 INFO L93 Difference]: Finished difference Result 732 states and 2133 transitions. [2022-02-11 00:35:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:35:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:19,139 INFO L225 Difference]: With dead ends: 732 [2022-02-11 00:35:19,139 INFO L226 Difference]: Without dead ends: 712 [2022-02-11 00:35:19,139 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:35:19,139 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 215 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:19,140 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 228 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-02-11 00:35:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 323. [2022-02-11 00:35:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2022-02-11 00:35:19,144 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 22 [2022-02-11 00:35:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:19,144 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2022-02-11 00:35:19,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2022-02-11 00:35:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:19,145 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:19,145 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:19,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-02-11 00:35:19,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-02-11 00:35:19,361 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:19,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1733366227, now seen corresponding path program 142 times [2022-02-11 00:35:19,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:19,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497468645] [2022-02-11 00:35:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:19,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:19,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:19,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497468645] [2022-02-11 00:35:19,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497468645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:19,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723947611] [2022-02-11 00:35:19,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:35:19,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:19,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:19,431 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:19,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-11 00:35:19,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:35:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:19,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:19,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:20,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:20,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:20,183 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:20,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:20,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:20,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723947611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:20,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:20,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:20,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81266901] [2022-02-11 00:35:20,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:20,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:20,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:20,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:20,190 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:20,628 INFO L93 Difference]: Finished difference Result 741 states and 2128 transitions. [2022-02-11 00:35:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:20,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:20,629 INFO L225 Difference]: With dead ends: 741 [2022-02-11 00:35:20,629 INFO L226 Difference]: Without dead ends: 705 [2022-02-11 00:35:20,630 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:20,630 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 141 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:20,630 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 234 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-11 00:35:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 317. [2022-02-11 00:35:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.971518987341772) internal successors, (939), 316 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 939 transitions. [2022-02-11 00:35:20,634 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 939 transitions. Word has length 22 [2022-02-11 00:35:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:20,634 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 939 transitions. [2022-02-11 00:35:20,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 939 transitions. [2022-02-11 00:35:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:20,635 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:20,635 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:20,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-02-11 00:35:20,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:20,835 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -257969397, now seen corresponding path program 143 times [2022-02-11 00:35:20,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:20,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207380327] [2022-02-11 00:35:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:20,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:20,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207380327] [2022-02-11 00:35:20,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207380327] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:20,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259147039] [2022-02-11 00:35:20,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:20,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:20,977 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:20,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-11 00:35:21,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:21,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:21,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:35:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:21,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:21,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:21,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:21,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:21,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:21,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:21,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259147039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:21,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:21,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:21,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017828989] [2022-02-11 00:35:21,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:21,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:21,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:21,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:21,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:21,731 INFO L87 Difference]: Start difference. First operand 317 states and 939 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:22,183 INFO L93 Difference]: Finished difference Result 644 states and 1879 transitions. [2022-02-11 00:35:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:22,184 INFO L225 Difference]: With dead ends: 644 [2022-02-11 00:35:22,184 INFO L226 Difference]: Without dead ends: 644 [2022-02-11 00:35:22,184 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:22,184 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 212 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:22,184 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 192 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-02-11 00:35:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 325. [2022-02-11 00:35:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0) internal successors, (972), 324 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 972 transitions. [2022-02-11 00:35:22,189 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 972 transitions. Word has length 22 [2022-02-11 00:35:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:22,189 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 972 transitions. [2022-02-11 00:35:22,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 972 transitions. [2022-02-11 00:35:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:22,189 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:22,189 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:22,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:22,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-02-11 00:35:22,390 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1236633567, now seen corresponding path program 144 times [2022-02-11 00:35:22,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:22,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122426779] [2022-02-11 00:35:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:22,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:22,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:22,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122426779] [2022-02-11 00:35:22,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122426779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:22,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856563324] [2022-02-11 00:35:22,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:22,478 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:22,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-11 00:35:22,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:35:22,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:22,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:22,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:35:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:22,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:23,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:23,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:23,229 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:23,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:23,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:23,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856563324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:23,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:23,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:23,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004435407] [2022-02-11 00:35:23,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:23,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:23,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:23,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:23,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:23,235 INFO L87 Difference]: Start difference. First operand 325 states and 972 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:23,958 INFO L93 Difference]: Finished difference Result 728 states and 2117 transitions. [2022-02-11 00:35:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:35:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:23,959 INFO L225 Difference]: With dead ends: 728 [2022-02-11 00:35:23,959 INFO L226 Difference]: Without dead ends: 718 [2022-02-11 00:35:23,960 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:35:23,960 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 207 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:23,960 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 231 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-02-11 00:35:23,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 322. [2022-02-11 00:35:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9906542056074765) internal successors, (960), 321 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 960 transitions. [2022-02-11 00:35:23,964 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 960 transitions. Word has length 22 [2022-02-11 00:35:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:23,964 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 960 transitions. [2022-02-11 00:35:23,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 960 transitions. [2022-02-11 00:35:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:23,965 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:23,965 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:23,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:24,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:24,165 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:24,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1661580777, now seen corresponding path program 145 times [2022-02-11 00:35:24,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:24,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146990711] [2022-02-11 00:35:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:24,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:24,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:24,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146990711] [2022-02-11 00:35:24,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146990711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:24,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184974846] [2022-02-11 00:35:24,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:24,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:24,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:24,230 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:24,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-11 00:35:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:24,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:24,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:24,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:24,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:24,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:24,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:24,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:24,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:24,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184974846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:24,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:24,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:24,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113767593] [2022-02-11 00:35:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:24,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:24,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:24,879 INFO L87 Difference]: Start difference. First operand 322 states and 960 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:25,366 INFO L93 Difference]: Finished difference Result 652 states and 1904 transitions. [2022-02-11 00:35:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:35:25,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:25,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:25,367 INFO L225 Difference]: With dead ends: 652 [2022-02-11 00:35:25,368 INFO L226 Difference]: Without dead ends: 632 [2022-02-11 00:35:25,368 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:35:25,368 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:25,368 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 173 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-11 00:35:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 319. [2022-02-11 00:35:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.981132075471698) internal successors, (948), 318 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 948 transitions. [2022-02-11 00:35:25,372 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 948 transitions. Word has length 22 [2022-02-11 00:35:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:25,372 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 948 transitions. [2022-02-11 00:35:25,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 948 transitions. [2022-02-11 00:35:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:25,373 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:25,373 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:25,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:25,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:25,585 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1038642111, now seen corresponding path program 146 times [2022-02-11 00:35:25,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:25,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333526554] [2022-02-11 00:35:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:25,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:25,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333526554] [2022-02-11 00:35:25,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333526554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:25,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843546988] [2022-02-11 00:35:25,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:25,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:25,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:25,660 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:25,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-11 00:35:25,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:25,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:25,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:25,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:25,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:25,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:35:25,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:35:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:26,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:26,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:26,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:26,204 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:26,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:26,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:26,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843546988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:26,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:26,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:26,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463672539] [2022-02-11 00:35:26,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:26,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:26,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:26,208 INFO L87 Difference]: Start difference. First operand 319 states and 948 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:26,603 INFO L93 Difference]: Finished difference Result 762 states and 2215 transitions. [2022-02-11 00:35:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:35:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:26,605 INFO L225 Difference]: With dead ends: 762 [2022-02-11 00:35:26,605 INFO L226 Difference]: Without dead ends: 762 [2022-02-11 00:35:26,605 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:35:26,605 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 260 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:26,605 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 250 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-02-11 00:35:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 329. [2022-02-11 00:35:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.033536585365854) internal successors, (995), 328 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 995 transitions. [2022-02-11 00:35:26,610 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 995 transitions. Word has length 22 [2022-02-11 00:35:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:26,610 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 995 transitions. [2022-02-11 00:35:26,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 995 transitions. [2022-02-11 00:35:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:26,610 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:26,610 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:26,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:26,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:26,812 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1761722221, now seen corresponding path program 147 times [2022-02-11 00:35:26,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:26,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899123755] [2022-02-11 00:35:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:26,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:26,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899123755] [2022-02-11 00:35:26,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899123755] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:26,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043323893] [2022-02-11 00:35:26,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:26,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:26,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:26,891 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:26,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-11 00:35:27,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:35:27,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:27,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:27,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:35:27,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:35:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:27,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:27,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:27,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:27,612 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:27,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:27,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:27,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043323893] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:27,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:27,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:27,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121554423] [2022-02-11 00:35:27,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:27,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:27,618 INFO L87 Difference]: Start difference. First operand 329 states and 995 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:28,417 INFO L93 Difference]: Finished difference Result 845 states and 2440 transitions. [2022-02-11 00:35:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:35:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:28,419 INFO L225 Difference]: With dead ends: 845 [2022-02-11 00:35:28,419 INFO L226 Difference]: Without dead ends: 835 [2022-02-11 00:35:28,419 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:35:28,419 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 278 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:28,419 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 245 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-11 00:35:28,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 336. [2022-02-11 00:35:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.011940298507463) internal successors, (1009), 335 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1009 transitions. [2022-02-11 00:35:28,424 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1009 transitions. Word has length 22 [2022-02-11 00:35:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:28,424 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1009 transitions. [2022-02-11 00:35:28,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1009 transitions. [2022-02-11 00:35:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:28,425 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:28,425 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:28,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:28,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:28,641 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash -720647029, now seen corresponding path program 148 times [2022-02-11 00:35:28,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:28,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078738863] [2022-02-11 00:35:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:28,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:28,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:28,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078738863] [2022-02-11 00:35:28,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078738863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:28,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587209199] [2022-02-11 00:35:28,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:35:28,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:28,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:28,729 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:28,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-11 00:35:28,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:35:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:28,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:29,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:35:29,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:35:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:29,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:29,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:29,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:29,520 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:29,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:29,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:29,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587209199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:29,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:29,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:29,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983048480] [2022-02-11 00:35:29,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:29,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:29,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:29,527 INFO L87 Difference]: Start difference. First operand 336 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:30,060 INFO L93 Difference]: Finished difference Result 770 states and 2210 transitions. [2022-02-11 00:35:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:35:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:30,061 INFO L225 Difference]: With dead ends: 770 [2022-02-11 00:35:30,061 INFO L226 Difference]: Without dead ends: 770 [2022-02-11 00:35:30,062 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:35:30,062 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 257 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:30,062 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 226 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-11 00:35:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 327. [2022-02-11 00:35:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.01840490797546) internal successors, (984), 326 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 984 transitions. [2022-02-11 00:35:30,067 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 984 transitions. Word has length 22 [2022-02-11 00:35:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:30,067 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 984 transitions. [2022-02-11 00:35:30,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 984 transitions. [2022-02-11 00:35:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:30,067 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:30,067 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:30,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:30,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-11 00:35:30,268 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1497490963, now seen corresponding path program 149 times [2022-02-11 00:35:30,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:30,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719778308] [2022-02-11 00:35:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:30,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:30,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719778308] [2022-02-11 00:35:30,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719778308] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:30,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708343073] [2022-02-11 00:35:30,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:30,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:30,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:30,357 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:30,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-11 00:35:30,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:35:30,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:30,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:30,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:30,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:35:30,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:35:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:30,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:31,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:31,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:35:31,107 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:31,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:31,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:31,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708343073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:31,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:31,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:31,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375740630] [2022-02-11 00:35:31,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:31,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:31,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:31,114 INFO L87 Difference]: Start difference. First operand 327 states and 984 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:31,609 INFO L93 Difference]: Finished difference Result 686 states and 1976 transitions. [2022-02-11 00:35:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:31,610 INFO L225 Difference]: With dead ends: 686 [2022-02-11 00:35:31,610 INFO L226 Difference]: Without dead ends: 677 [2022-02-11 00:35:31,611 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:31,611 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 207 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:31,611 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 215 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-02-11 00:35:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 333. [2022-02-11 00:35:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2022-02-11 00:35:31,615 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 22 [2022-02-11 00:35:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:31,616 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2022-02-11 00:35:31,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2022-02-11 00:35:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:31,616 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:31,616 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:31,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:31,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-11 00:35:31,822 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1839740457, now seen corresponding path program 150 times [2022-02-11 00:35:31,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:31,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819753148] [2022-02-11 00:35:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:31,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:31,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:31,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819753148] [2022-02-11 00:35:31,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819753148] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:31,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685144786] [2022-02-11 00:35:31,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:31,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:31,897 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:31,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-11 00:35:32,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:35:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:32,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:32,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:32,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:35:32,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:35:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:32,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:32,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:32,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:35:32,607 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:32,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:32,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:32,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685144786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:32,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:32,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:35:32,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181756026] [2022-02-11 00:35:32,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:32,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:35:32,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:35:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:35:32,613 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:33,439 INFO L93 Difference]: Finished difference Result 814 states and 2298 transitions. [2022-02-11 00:35:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:35:33,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:33,440 INFO L225 Difference]: With dead ends: 814 [2022-02-11 00:35:33,440 INFO L226 Difference]: Without dead ends: 804 [2022-02-11 00:35:33,440 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=1306, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:35:33,440 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:33,442 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 260 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-11 00:35:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 355. [2022-02-11 00:35:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.994350282485876) internal successors, (1060), 354 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1060 transitions. [2022-02-11 00:35:33,451 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1060 transitions. Word has length 22 [2022-02-11 00:35:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:33,451 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1060 transitions. [2022-02-11 00:35:33,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1060 transitions. [2022-02-11 00:35:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:33,452 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:33,452 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:33,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:33,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-11 00:35:33,667 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:33,667 INFO L85 PathProgramCache]: Analyzing trace with hash 258968541, now seen corresponding path program 151 times [2022-02-11 00:35:33,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:33,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548688410] [2022-02-11 00:35:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:33,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:33,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:33,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548688410] [2022-02-11 00:35:33,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548688410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:33,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687465684] [2022-02-11 00:35:33,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:33,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:33,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:33,751 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:33,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-11 00:35:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:33,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:34,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:34,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:35:34,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:35:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:34,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:34,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:34,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:34,367 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:34,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:34,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:34,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687465684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:34,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:34,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:35:34,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479515754] [2022-02-11 00:35:34,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:34,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:35:34,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:34,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:35:34,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:35:34,373 INFO L87 Difference]: Start difference. First operand 355 states and 1060 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:35,049 INFO L93 Difference]: Finished difference Result 771 states and 2187 transitions. [2022-02-11 00:35:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:35:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:35,051 INFO L225 Difference]: With dead ends: 771 [2022-02-11 00:35:35,051 INFO L226 Difference]: Without dead ends: 759 [2022-02-11 00:35:35,051 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:35:35,051 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 204 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:35,051 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 238 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-02-11 00:35:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 335. [2022-02-11 00:35:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9940119760479043) internal successors, (1000), 334 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1000 transitions. [2022-02-11 00:35:35,056 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1000 transitions. Word has length 22 [2022-02-11 00:35:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:35,056 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1000 transitions. [2022-02-11 00:35:35,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1000 transitions. [2022-02-11 00:35:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:35,057 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:35,057 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:35,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-11 00:35:35,271 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1637774099, now seen corresponding path program 152 times [2022-02-11 00:35:35,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:35,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489618477] [2022-02-11 00:35:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:35,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:35,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:35,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489618477] [2022-02-11 00:35:35,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489618477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:35,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597421555] [2022-02-11 00:35:35,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:35,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:35,342 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:35,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-11 00:35:35,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:35,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:35,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:35,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:35,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:35,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:36,117 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:36,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:36,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:36,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597421555] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:36,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:36,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:36,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438197379] [2022-02-11 00:35:36,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:36,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:36,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:36,124 INFO L87 Difference]: Start difference. First operand 335 states and 1000 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:36,640 INFO L93 Difference]: Finished difference Result 634 states and 1850 transitions. [2022-02-11 00:35:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:35:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:36,642 INFO L225 Difference]: With dead ends: 634 [2022-02-11 00:35:36,642 INFO L226 Difference]: Without dead ends: 614 [2022-02-11 00:35:36,642 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:35:36,642 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:36,642 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 177 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:36,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-02-11 00:35:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 341. [2022-02-11 00:35:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9794117647058824) internal successors, (1013), 340 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1013 transitions. [2022-02-11 00:35:36,647 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1013 transitions. Word has length 22 [2022-02-11 00:35:36,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:36,647 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1013 transitions. [2022-02-11 00:35:36,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:36,647 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1013 transitions. [2022-02-11 00:35:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:36,647 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:36,647 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:36,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:36,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:36,855 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash -121515041, now seen corresponding path program 153 times [2022-02-11 00:35:36,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:36,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749680660] [2022-02-11 00:35:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:36,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:36,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:36,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749680660] [2022-02-11 00:35:36,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749680660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:36,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934255906] [2022-02-11 00:35:36,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:36,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:36,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:36,908 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:36,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-11 00:35:37,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:35:37,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:37,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:37,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-02-11 00:35:37,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-11 00:35:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:37,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:37,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:37,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:37,566 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:37,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:37,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:37,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934255906] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:37,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:37,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:35:37,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219304814] [2022-02-11 00:35:37,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:37,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:35:37,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:35:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:35:37,572 INFO L87 Difference]: Start difference. First operand 341 states and 1013 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:38,145 INFO L93 Difference]: Finished difference Result 712 states and 2028 transitions. [2022-02-11 00:35:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:35:38,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:38,147 INFO L225 Difference]: With dead ends: 712 [2022-02-11 00:35:38,147 INFO L226 Difference]: Without dead ends: 702 [2022-02-11 00:35:38,147 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:35:38,147 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 191 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:38,147 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 245 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-11 00:35:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 363. [2022-02-11 00:35:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.9751381215469612) internal successors, (1077), 362 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1077 transitions. [2022-02-11 00:35:38,152 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1077 transitions. Word has length 22 [2022-02-11 00:35:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:38,152 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1077 transitions. [2022-02-11 00:35:38,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1077 transitions. [2022-02-11 00:35:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:38,152 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:38,152 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:38,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-02-11 00:35:38,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:38,369 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:38,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1702286957, now seen corresponding path program 154 times [2022-02-11 00:35:38,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:38,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647213746] [2022-02-11 00:35:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:38,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:38,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:38,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647213746] [2022-02-11 00:35:38,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647213746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:38,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707177268] [2022-02-11 00:35:38,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:35:38,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:38,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:38,431 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:38,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-11 00:35:38,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:35:38,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:38,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:38,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:38,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-02-11 00:35:38,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-11 00:35:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:38,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:38,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:38,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:38,984 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:38,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:38,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:38,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707177268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:38,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:38,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:35:38,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151196082] [2022-02-11 00:35:38,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:38,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:35:38,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:35:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:35:38,988 INFO L87 Difference]: Start difference. First operand 363 states and 1077 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:39,287 INFO L93 Difference]: Finished difference Result 669 states and 1917 transitions. [2022-02-11 00:35:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:35:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:39,288 INFO L225 Difference]: With dead ends: 669 [2022-02-11 00:35:39,288 INFO L226 Difference]: Without dead ends: 654 [2022-02-11 00:35:39,288 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:39,289 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:39,289 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 164 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:35:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-02-11 00:35:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 337. [2022-02-11 00:35:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.988095238095238) internal successors, (1004), 336 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1004 transitions. [2022-02-11 00:35:39,293 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1004 transitions. Word has length 22 [2022-02-11 00:35:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:39,293 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1004 transitions. [2022-02-11 00:35:39,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1004 transitions. [2022-02-11 00:35:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:39,294 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:39,294 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:39,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:39,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:39,510 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:39,510 INFO L85 PathProgramCache]: Analyzing trace with hash 995359209, now seen corresponding path program 155 times [2022-02-11 00:35:39,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:39,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507299733] [2022-02-11 00:35:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:39,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:39,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507299733] [2022-02-11 00:35:39,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507299733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:39,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592271118] [2022-02-11 00:35:39,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:39,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:39,552 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:39,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-11 00:35:39,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:35:39,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:39,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:39,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:39,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:39,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:39,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:39,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:35:40,002 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:40,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:40,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:40,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592271118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:40,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:40,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:40,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647843327] [2022-02-11 00:35:40,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:40,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:40,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:40,007 INFO L87 Difference]: Start difference. First operand 337 states and 1004 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:40,304 INFO L93 Difference]: Finished difference Result 650 states and 1872 transitions. [2022-02-11 00:35:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:40,305 INFO L225 Difference]: With dead ends: 650 [2022-02-11 00:35:40,305 INFO L226 Difference]: Without dead ends: 614 [2022-02-11 00:35:40,305 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:40,305 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:40,305 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 209 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-02-11 00:35:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 347. [2022-02-11 00:35:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.96242774566474) internal successors, (1025), 346 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1025 transitions. [2022-02-11 00:35:40,309 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1025 transitions. Word has length 22 [2022-02-11 00:35:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:40,309 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1025 transitions. [2022-02-11 00:35:40,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1025 transitions. [2022-02-11 00:35:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:40,310 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:40,310 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:40,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-02-11 00:35:40,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:40,511 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1582207485, now seen corresponding path program 156 times [2022-02-11 00:35:40,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:40,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88737601] [2022-02-11 00:35:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:40,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:40,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:40,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88737601] [2022-02-11 00:35:40,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88737601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:40,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123415769] [2022-02-11 00:35:40,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:40,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:40,572 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:40,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-11 00:35:40,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:35:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:40,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:40,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:41,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:41,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:35:41,180 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:41,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:41,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:41,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123415769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:41,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:41,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:41,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105924684] [2022-02-11 00:35:41,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:41,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:41,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:41,187 INFO L87 Difference]: Start difference. First operand 347 states and 1025 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:41,683 INFO L93 Difference]: Finished difference Result 594 states and 1722 transitions. [2022-02-11 00:35:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:41,684 INFO L225 Difference]: With dead ends: 594 [2022-02-11 00:35:41,684 INFO L226 Difference]: Without dead ends: 574 [2022-02-11 00:35:41,684 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:35:41,684 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:41,684 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 235 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-02-11 00:35:41,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 353. [2022-02-11 00:35:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.9488636363636362) internal successors, (1038), 352 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1038 transitions. [2022-02-11 00:35:41,688 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1038 transitions. Word has length 22 [2022-02-11 00:35:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:41,688 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1038 transitions. [2022-02-11 00:35:41,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1038 transitions. [2022-02-11 00:35:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:41,689 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:41,689 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:41,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:41,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2022-02-11 00:35:41,903 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:41,903 INFO L85 PathProgramCache]: Analyzing trace with hash 953470671, now seen corresponding path program 157 times [2022-02-11 00:35:41,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:41,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762435115] [2022-02-11 00:35:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:41,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:41,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:41,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762435115] [2022-02-11 00:35:41,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762435115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:41,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953736519] [2022-02-11 00:35:41,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:41,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:41,948 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:41,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-11 00:35:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:42,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:42,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-02-11 00:35:42,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-11 00:35:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:42,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:42,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:42,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:42,545 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:42,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:42,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:42,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953736519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:42,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:42,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:35:42,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129976349] [2022-02-11 00:35:42,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:42,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:35:42,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:35:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:35:42,552 INFO L87 Difference]: Start difference. First operand 353 states and 1038 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:43,096 INFO L93 Difference]: Finished difference Result 639 states and 1811 transitions. [2022-02-11 00:35:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:35:43,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:43,097 INFO L225 Difference]: With dead ends: 639 [2022-02-11 00:35:43,097 INFO L226 Difference]: Without dead ends: 609 [2022-02-11 00:35:43,097 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:43,097 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:43,097 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 248 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-02-11 00:35:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 340. [2022-02-11 00:35:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.976401179941003) internal successors, (1009), 339 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1009 transitions. [2022-02-11 00:35:43,102 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1009 transitions. Word has length 22 [2022-02-11 00:35:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:43,102 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1009 transitions. [2022-02-11 00:35:43,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1009 transitions. [2022-02-11 00:35:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:43,102 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:43,102 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:43,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-11 00:35:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:43,315 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 836691451, now seen corresponding path program 158 times [2022-02-11 00:35:43,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:43,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068910560] [2022-02-11 00:35:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:43,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:43,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:43,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068910560] [2022-02-11 00:35:43,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068910560] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:43,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92448430] [2022-02-11 00:35:43,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:43,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:43,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:43,384 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:43,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-11 00:35:43,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:43,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:43,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:43,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:35:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:43,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:43,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:43,997 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:43,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:43,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:44,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92448430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:44,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:44,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:44,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385524840] [2022-02-11 00:35:44,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:44,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:44,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:44,003 INFO L87 Difference]: Start difference. First operand 340 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:44,311 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2022-02-11 00:35:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:44,312 INFO L225 Difference]: With dead ends: 613 [2022-02-11 00:35:44,312 INFO L226 Difference]: Without dead ends: 613 [2022-02-11 00:35:44,312 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:44,312 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 163 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:44,312 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 196 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-11 00:35:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 349. [2022-02-11 00:35:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2022-02-11 00:35:44,317 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2022-02-11 00:35:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:44,317 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2022-02-11 00:35:44,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2022-02-11 00:35:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:44,317 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:44,317 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:44,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:44,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:44,534 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1963672881, now seen corresponding path program 159 times [2022-02-11 00:35:44,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:44,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823039069] [2022-02-11 00:35:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:44,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:44,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:44,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823039069] [2022-02-11 00:35:44,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823039069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:44,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052137662] [2022-02-11 00:35:44,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:44,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:44,602 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:44,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-11 00:35:44,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:35:44,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:44,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:35:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:44,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:45,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:45,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:45,178 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:45,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:45,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:45,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052137662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:45,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:45,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:45,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535482878] [2022-02-11 00:35:45,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:45,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:45,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:45,184 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:45,653 INFO L93 Difference]: Finished difference Result 636 states and 1819 transitions. [2022-02-11 00:35:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:35:45,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:45,654 INFO L225 Difference]: With dead ends: 636 [2022-02-11 00:35:45,654 INFO L226 Difference]: Without dead ends: 626 [2022-02-11 00:35:45,654 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:35:45,654 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 199 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:45,654 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 180 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-02-11 00:35:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 346. [2022-02-11 00:35:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9565217391304346) internal successors, (1020), 345 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1020 transitions. [2022-02-11 00:35:45,659 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1020 transitions. Word has length 22 [2022-02-11 00:35:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:45,659 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1020 transitions. [2022-02-11 00:35:45,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1020 transitions. [2022-02-11 00:35:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:45,659 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:45,659 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:45,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:45,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-02-11 00:35:45,860 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1538725671, now seen corresponding path program 160 times [2022-02-11 00:35:45,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:45,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181376291] [2022-02-11 00:35:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:45,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:45,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:45,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181376291] [2022-02-11 00:35:45,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181376291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:45,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125258610] [2022-02-11 00:35:45,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:35:45,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:45,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:45,950 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:45,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-11 00:35:46,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:35:46,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:46,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:46,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:46,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:46,520 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:46,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:46,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:46,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125258610] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:46,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:46,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:46,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003555939] [2022-02-11 00:35:46,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:46,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:46,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:46,526 INFO L87 Difference]: Start difference. First operand 346 states and 1020 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:46,910 INFO L93 Difference]: Finished difference Result 622 states and 1797 transitions. [2022-02-11 00:35:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:35:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:46,911 INFO L225 Difference]: With dead ends: 622 [2022-02-11 00:35:46,911 INFO L226 Difference]: Without dead ends: 602 [2022-02-11 00:35:46,911 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:35:46,911 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 134 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:46,911 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 239 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-02-11 00:35:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 343. [2022-02-11 00:35:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.9473684210526314) internal successors, (1008), 342 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1008 transitions. [2022-02-11 00:35:46,916 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1008 transitions. Word has length 22 [2022-02-11 00:35:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:46,916 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1008 transitions. [2022-02-11 00:35:46,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1008 transitions. [2022-02-11 00:35:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:46,916 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:46,916 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:46,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:47,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-02-11 00:35:47,133 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash 232870889, now seen corresponding path program 161 times [2022-02-11 00:35:47,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:47,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101032508] [2022-02-11 00:35:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:47,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:47,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:47,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101032508] [2022-02-11 00:35:47,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101032508] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:47,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243747680] [2022-02-11 00:35:47,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:47,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:47,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:47,198 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:47,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-11 00:35:47,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:47,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:47,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:47,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:47,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:47,747 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:47,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:47,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:47,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243747680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:47,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:47,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:47,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303489070] [2022-02-11 00:35:47,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:47,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:47,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:47,754 INFO L87 Difference]: Start difference. First operand 343 states and 1008 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:48,156 INFO L93 Difference]: Finished difference Result 550 states and 1589 transitions. [2022-02-11 00:35:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:48,157 INFO L225 Difference]: With dead ends: 550 [2022-02-11 00:35:48,158 INFO L226 Difference]: Without dead ends: 514 [2022-02-11 00:35:48,158 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:48,158 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:48,158 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 252 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:35:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-11 00:35:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 317. [2022-02-11 00:35:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9462025316455698) internal successors, (931), 316 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 931 transitions. [2022-02-11 00:35:48,162 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 931 transitions. Word has length 22 [2022-02-11 00:35:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:48,162 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 931 transitions. [2022-02-11 00:35:48,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 931 transitions. [2022-02-11 00:35:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:48,162 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:48,162 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:48,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:48,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-11 00:35:48,379 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1000298955, now seen corresponding path program 162 times [2022-02-11 00:35:48,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:48,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864150240] [2022-02-11 00:35:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:48,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:48,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864150240] [2022-02-11 00:35:48,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864150240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:48,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48690910] [2022-02-11 00:35:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:48,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:48,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:48,435 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:48,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-11 00:35:48,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:35:48,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:48,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:48,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:35:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:48,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:48,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:48,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:48,909 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:48,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:48,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:48,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48690910] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:48,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:48,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:48,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862109003] [2022-02-11 00:35:48,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:48,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:48,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:48,913 INFO L87 Difference]: Start difference. First operand 317 states and 931 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:49,120 INFO L93 Difference]: Finished difference Result 499 states and 1457 transitions. [2022-02-11 00:35:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:35:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:49,121 INFO L225 Difference]: With dead ends: 499 [2022-02-11 00:35:49,121 INFO L226 Difference]: Without dead ends: 499 [2022-02-11 00:35:49,122 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:35:49,122 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 119 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:49,122 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 205 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-11 00:35:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 326. [2022-02-11 00:35:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9661538461538464) internal successors, (964), 325 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 964 transitions. [2022-02-11 00:35:49,133 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 964 transitions. Word has length 22 [2022-02-11 00:35:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:49,133 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 964 transitions. [2022-02-11 00:35:49,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 964 transitions. [2022-02-11 00:35:49,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:49,133 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:49,133 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:49,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:49,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:49,350 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:49,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1800065377, now seen corresponding path program 163 times [2022-02-11 00:35:49,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:49,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548327194] [2022-02-11 00:35:49,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:49,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:49,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:49,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548327194] [2022-02-11 00:35:49,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548327194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:49,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742085302] [2022-02-11 00:35:49,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:49,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:49,398 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:49,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-11 00:35:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:49,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:49,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:49,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:35:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:49,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:49,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:49,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:49,850 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:49,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:49,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:49,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742085302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:49,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:49,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:49,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919889562] [2022-02-11 00:35:49,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:49,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:49,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:49,855 INFO L87 Difference]: Start difference. First operand 326 states and 964 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:50,100 INFO L93 Difference]: Finished difference Result 530 states and 1536 transitions. [2022-02-11 00:35:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:50,101 INFO L225 Difference]: With dead ends: 530 [2022-02-11 00:35:50,101 INFO L226 Difference]: Without dead ends: 520 [2022-02-11 00:35:50,101 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:50,101 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:50,101 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 197 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-11 00:35:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 323. [2022-02-11 00:35:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9565217391304346) internal successors, (952), 322 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 952 transitions. [2022-02-11 00:35:50,105 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 952 transitions. Word has length 22 [2022-02-11 00:35:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:50,105 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 952 transitions. [2022-02-11 00:35:50,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 952 transitions. [2022-02-11 00:35:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:50,105 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:50,105 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:50,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:50,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-02-11 00:35:50,320 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1375118167, now seen corresponding path program 164 times [2022-02-11 00:35:50,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:50,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745803412] [2022-02-11 00:35:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:50,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:50,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745803412] [2022-02-11 00:35:50,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745803412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:50,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815718559] [2022-02-11 00:35:50,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:50,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:50,365 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:50,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-11 00:35:50,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:50,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:50,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:50,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:50,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:50,924 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:50,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:50,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:50,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815718559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:50,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:50,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:50,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548407880] [2022-02-11 00:35:50,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:50,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:50,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:50,930 INFO L87 Difference]: Start difference. First operand 323 states and 952 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:51,248 INFO L93 Difference]: Finished difference Result 481 states and 1408 transitions. [2022-02-11 00:35:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:51,249 INFO L225 Difference]: With dead ends: 481 [2022-02-11 00:35:51,249 INFO L226 Difference]: Without dead ends: 461 [2022-02-11 00:35:51,249 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:35:51,249 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:51,250 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 177 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-02-11 00:35:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 320. [2022-02-11 00:35:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2022-02-11 00:35:51,253 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2022-02-11 00:35:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:51,253 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2022-02-11 00:35:51,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2022-02-11 00:35:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:51,254 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:51,254 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:51,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:51,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-02-11 00:35:51,454 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:51,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:51,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1214196745, now seen corresponding path program 165 times [2022-02-11 00:35:51,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:51,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784419465] [2022-02-11 00:35:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:51,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:51,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:51,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784419465] [2022-02-11 00:35:51,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784419465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:51,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937124573] [2022-02-11 00:35:51,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:51,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:51,528 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:51,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-11 00:35:51,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:35:51,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:51,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:35:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:51,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:52,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:52,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:52,162 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:52,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:52,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:52,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937124573] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:52,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:52,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:52,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902341292] [2022-02-11 00:35:52,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:52,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:52,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:52,169 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:52,463 INFO L93 Difference]: Finished difference Result 591 states and 1707 transitions. [2022-02-11 00:35:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:35:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:52,464 INFO L225 Difference]: With dead ends: 591 [2022-02-11 00:35:52,464 INFO L226 Difference]: Without dead ends: 591 [2022-02-11 00:35:52,464 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:52,465 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:52,465 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 160 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-11 00:35:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 332. [2022-02-11 00:35:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.984894259818731) internal successors, (988), 331 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 988 transitions. [2022-02-11 00:35:52,469 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 988 transitions. Word has length 22 [2022-02-11 00:35:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:52,469 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 988 transitions. [2022-02-11 00:35:52,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 988 transitions. [2022-02-11 00:35:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:52,469 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:52,469 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:52,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-02-11 00:35:52,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-02-11 00:35:52,672 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:52,673 INFO L85 PathProgramCache]: Analyzing trace with hash 280406219, now seen corresponding path program 166 times [2022-02-11 00:35:52,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:52,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340720294] [2022-02-11 00:35:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:52,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:52,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:52,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340720294] [2022-02-11 00:35:52,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340720294] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:52,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762153958] [2022-02-11 00:35:52,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:35:52,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:52,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:52,747 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:52,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-11 00:35:52,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:35:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:53,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:35:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:53,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:53,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:53,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:53,329 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:53,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:53,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:53,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762153958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:53,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:53,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:53,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585395642] [2022-02-11 00:35:53,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:53,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:53,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:53,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:53,335 INFO L87 Difference]: Start difference. First operand 332 states and 988 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:53,574 INFO L93 Difference]: Finished difference Result 534 states and 1552 transitions. [2022-02-11 00:35:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:35:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:53,575 INFO L225 Difference]: With dead ends: 534 [2022-02-11 00:35:53,575 INFO L226 Difference]: Without dead ends: 524 [2022-02-11 00:35:53,575 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:35:53,576 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:53,576 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 156 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-11 00:35:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 339. [2022-02-11 00:35:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.964497041420118) internal successors, (1002), 338 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1002 transitions. [2022-02-11 00:35:53,580 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1002 transitions. Word has length 22 [2022-02-11 00:35:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:53,580 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1002 transitions. [2022-02-11 00:35:53,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1002 transitions. [2022-02-11 00:35:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:53,580 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:53,580 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:53,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:53,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:53,783 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash -38706101, now seen corresponding path program 167 times [2022-02-11 00:35:53,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:53,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157912631] [2022-02-11 00:35:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:53,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:53,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:53,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157912631] [2022-02-11 00:35:53,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157912631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:53,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866884783] [2022-02-11 00:35:53,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:35:53,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:53,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:53,888 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:53,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-11 00:35:54,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:54,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:54,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:54,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:35:54,548 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:54,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:54,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:54,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866884783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:54,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:54,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:54,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654039847] [2022-02-11 00:35:54,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:54,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:54,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:54,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:54,555 INFO L87 Difference]: Start difference. First operand 339 states and 1002 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:54,773 INFO L93 Difference]: Finished difference Result 458 states and 1354 transitions. [2022-02-11 00:35:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:35:54,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:54,774 INFO L225 Difference]: With dead ends: 458 [2022-02-11 00:35:54,774 INFO L226 Difference]: Without dead ends: 458 [2022-02-11 00:35:54,774 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:35:54,775 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:54,775 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 127 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-11 00:35:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 311. [2022-02-11 00:35:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.945161290322581) internal successors, (913), 310 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 913 transitions. [2022-02-11 00:35:54,782 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 913 transitions. Word has length 22 [2022-02-11 00:35:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:54,782 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 913 transitions. [2022-02-11 00:35:54,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 913 transitions. [2022-02-11 00:35:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:54,783 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:54,783 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:54,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:55,000 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1499669411, now seen corresponding path program 168 times [2022-02-11 00:35:55,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:55,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084523747] [2022-02-11 00:35:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:55,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:55,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:55,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084523747] [2022-02-11 00:35:55,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084523747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:55,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404541560] [2022-02-11 00:35:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:35:55,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:55,095 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-11 00:35:55,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:35:55,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:55,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:55,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:55,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:35:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:55,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:55,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:55,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:55,777 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:55,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:55,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:55,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404541560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:55,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:55,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:55,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884411553] [2022-02-11 00:35:55,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:55,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:55,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:55,783 INFO L87 Difference]: Start difference. First operand 311 states and 913 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:56,080 INFO L93 Difference]: Finished difference Result 493 states and 1438 transitions. [2022-02-11 00:35:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:35:56,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:56,081 INFO L225 Difference]: With dead ends: 493 [2022-02-11 00:35:56,081 INFO L226 Difference]: Without dead ends: 493 [2022-02-11 00:35:56,081 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:56,082 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 137 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:56,082 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 187 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-02-11 00:35:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 321. [2022-02-11 00:35:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.978125) internal successors, (953), 320 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 953 transitions. [2022-02-11 00:35:56,086 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 953 transitions. Word has length 22 [2022-02-11 00:35:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:56,086 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 953 transitions. [2022-02-11 00:35:56,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 953 transitions. [2022-02-11 00:35:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:56,086 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:56,086 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:56,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:56,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:56,288 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash -5066447, now seen corresponding path program 169 times [2022-02-11 00:35:56,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:56,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821567786] [2022-02-11 00:35:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:56,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:56,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821567786] [2022-02-11 00:35:56,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821567786] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:56,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035821357] [2022-02-11 00:35:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:35:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:56,397 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:56,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-11 00:35:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:56,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:56,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:56,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:56,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:35:56,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:35:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:56,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:56,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:56,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:57,066 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:57,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:57,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:57,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035821357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:57,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:57,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:57,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584654717] [2022-02-11 00:35:57,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:57,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:57,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:57,072 INFO L87 Difference]: Start difference. First operand 321 states and 953 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:57,467 INFO L93 Difference]: Finished difference Result 524 states and 1517 transitions. [2022-02-11 00:35:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:57,468 INFO L225 Difference]: With dead ends: 524 [2022-02-11 00:35:57,468 INFO L226 Difference]: Without dead ends: 514 [2022-02-11 00:35:57,468 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:35:57,468 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:57,468 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 230 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-11 00:35:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 318. [2022-02-11 00:35:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2022-02-11 00:35:57,472 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2022-02-11 00:35:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:57,472 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2022-02-11 00:35:57,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2022-02-11 00:35:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:57,472 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:57,472 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:57,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-02-11 00:35:57,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:57,689 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash 419880763, now seen corresponding path program 170 times [2022-02-11 00:35:57,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:57,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543779591] [2022-02-11 00:35:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:57,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:57,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543779591] [2022-02-11 00:35:57,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543779591] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:57,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486647124] [2022-02-11 00:35:57,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:35:57,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:57,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:57,759 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:57,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-11 00:35:57,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:35:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:58,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:58,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:58,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:58,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:58,488 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:58,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:58,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:58,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486647124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:58,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:58,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:35:58,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969995384] [2022-02-11 00:35:58,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:58,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:35:58,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:35:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:35:58,495 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:35:58,852 INFO L93 Difference]: Finished difference Result 485 states and 1415 transitions. [2022-02-11 00:35:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:35:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:35:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:35:58,853 INFO L225 Difference]: With dead ends: 485 [2022-02-11 00:35:58,853 INFO L226 Difference]: Without dead ends: 465 [2022-02-11 00:35:58,853 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:35:58,853 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:35:58,854 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 172 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:35:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-02-11 00:35:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 315. [2022-02-11 00:35:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9585987261146496) internal successors, (929), 314 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 929 transitions. [2022-02-11 00:35:58,857 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 929 transitions. Word has length 22 [2022-02-11 00:35:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:35:58,857 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 929 transitions. [2022-02-11 00:35:58,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:35:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 929 transitions. [2022-02-11 00:35:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:35:58,858 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:35:58,858 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:35:58,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-02-11 00:35:59,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-02-11 00:35:59,058 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:35:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:35:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash -203057903, now seen corresponding path program 171 times [2022-02-11 00:35:59,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:35:59,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196955393] [2022-02-11 00:35:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:35:59,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:35:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:35:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:59,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:35:59,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196955393] [2022-02-11 00:35:59,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196955393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:35:59,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574796363] [2022-02-11 00:35:59,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:35:59,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:35:59,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:35:59,152 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:35:59,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-11 00:35:59,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:35:59,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:35:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:35:59,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:35:59,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:35:59,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:35:59,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:35:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:59,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:35:59,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:35:59,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:35:59,827 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:35:59,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:35:59,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:35:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:35:59,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574796363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:35:59,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:35:59,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:35:59,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889993845] [2022-02-11 00:35:59,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:35:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:35:59,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:35:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:35:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:35:59,834 INFO L87 Difference]: Start difference. First operand 315 states and 929 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:00,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:00,147 INFO L93 Difference]: Finished difference Result 611 states and 1774 transitions. [2022-02-11 00:36:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:00,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:00,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:00,148 INFO L225 Difference]: With dead ends: 611 [2022-02-11 00:36:00,148 INFO L226 Difference]: Without dead ends: 611 [2022-02-11 00:36:00,148 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:36:00,149 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 287 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:00,149 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 146 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-11 00:36:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 325. [2022-02-11 00:36:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0123456790123457) internal successors, (976), 324 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 976 transitions. [2022-02-11 00:36:00,153 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 976 transitions. Word has length 22 [2022-02-11 00:36:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:00,153 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 976 transitions. [2022-02-11 00:36:00,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 976 transitions. [2022-02-11 00:36:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:00,153 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:00,153 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:00,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:00,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:00,370 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1291545061, now seen corresponding path program 172 times [2022-02-11 00:36:00,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:00,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248960256] [2022-02-11 00:36:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:00,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:00,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:00,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248960256] [2022-02-11 00:36:00,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248960256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:00,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004378581] [2022-02-11 00:36:00,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:00,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:00,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:00,457 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:00,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-11 00:36:00,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:00,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:00,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:00,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:00,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:00,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:36:00,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:36:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:00,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:00,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:00,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:01,145 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:01,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:01,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:01,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004378581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:01,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:01,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:01,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220604394] [2022-02-11 00:36:01,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:01,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:01,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:01,151 INFO L87 Difference]: Start difference. First operand 325 states and 976 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:01,590 INFO L93 Difference]: Finished difference Result 653 states and 1876 transitions. [2022-02-11 00:36:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:36:01,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:01,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:01,591 INFO L225 Difference]: With dead ends: 653 [2022-02-11 00:36:01,591 INFO L226 Difference]: Without dead ends: 643 [2022-02-11 00:36:01,591 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:36:01,591 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 218 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:01,591 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 217 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-11 00:36:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 332. [2022-02-11 00:36:01,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2022-02-11 00:36:01,596 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 22 [2022-02-11 00:36:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:01,596 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2022-02-11 00:36:01,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2022-02-11 00:36:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:01,596 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:01,596 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:01,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:01,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:01,809 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1962347043, now seen corresponding path program 173 times [2022-02-11 00:36:01,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:01,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882346274] [2022-02-11 00:36:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:01,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:01,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882346274] [2022-02-11 00:36:01,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882346274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:01,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665430357] [2022-02-11 00:36:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:01,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:01,872 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:01,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-11 00:36:02,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:36:02,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:02,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:02,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:02,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-02-11 00:36:02,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-11 00:36:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:02,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:02,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:02,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:02,478 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:02,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:02,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:02,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665430357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:02,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:02,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:36:02,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793349790] [2022-02-11 00:36:02,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:02,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:36:02,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:36:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:36:02,485 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:02,780 INFO L93 Difference]: Finished difference Result 694 states and 1955 transitions. [2022-02-11 00:36:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:02,783 INFO L225 Difference]: With dead ends: 694 [2022-02-11 00:36:02,783 INFO L226 Difference]: Without dead ends: 694 [2022-02-11 00:36:02,783 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:36:02,783 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:02,784 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 225 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-11 00:36:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 323. [2022-02-11 00:36:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2022-02-11 00:36:02,788 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 22 [2022-02-11 00:36:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:02,788 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2022-02-11 00:36:02,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2022-02-11 00:36:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:02,789 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:02,789 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:02,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:03,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-02-11 00:36:03,003 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash 255790949, now seen corresponding path program 174 times [2022-02-11 00:36:03,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:03,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579796588] [2022-02-11 00:36:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:03,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:03,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:03,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579796588] [2022-02-11 00:36:03,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579796588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:03,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572596942] [2022-02-11 00:36:03,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:36:03,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:03,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:03,085 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:03,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-11 00:36:03,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:36:03,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:03,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:03,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:03,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-11 00:36:03,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:36:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:03,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:03,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:03,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:03,884 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:03,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:03,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:03,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572596942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:03,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:03,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:03,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089074477] [2022-02-11 00:36:03,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:03,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:03,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:03,891 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:04,166 INFO L93 Difference]: Finished difference Result 535 states and 1535 transitions. [2022-02-11 00:36:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:04,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:04,167 INFO L225 Difference]: With dead ends: 535 [2022-02-11 00:36:04,167 INFO L226 Difference]: Without dead ends: 526 [2022-02-11 00:36:04,167 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:04,167 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:04,167 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 151 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-11 00:36:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 329. [2022-02-11 00:36:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2022-02-11 00:36:04,171 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 22 [2022-02-11 00:36:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:04,171 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2022-02-11 00:36:04,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2022-02-11 00:36:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:04,172 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:04,172 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:04,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:04,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:04,372 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash 598040443, now seen corresponding path program 175 times [2022-02-11 00:36:04,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:04,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284014081] [2022-02-11 00:36:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:04,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:04,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284014081] [2022-02-11 00:36:04,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284014081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:04,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345813072] [2022-02-11 00:36:04,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:36:04,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:04,459 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:04,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-11 00:36:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:04,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:04,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:04,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-11 00:36:04,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 00:36:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:04,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:05,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:05,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:05,189 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:05,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:05,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:05,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345813072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:05,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:05,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:05,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368084248] [2022-02-11 00:36:05,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:05,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:05,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:05,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:05,196 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:05,684 INFO L93 Difference]: Finished difference Result 635 states and 1773 transitions. [2022-02-11 00:36:05,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:36:05,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:05,685 INFO L225 Difference]: With dead ends: 635 [2022-02-11 00:36:05,685 INFO L226 Difference]: Without dead ends: 625 [2022-02-11 00:36:05,685 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:36:05,686 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:05,686 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 219 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:36:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-11 00:36:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 351. [2022-02-11 00:36:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.974285714285714) internal successors, (1041), 350 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1041 transitions. [2022-02-11 00:36:05,690 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1041 transitions. Word has length 22 [2022-02-11 00:36:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:05,690 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1041 transitions. [2022-02-11 00:36:05,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1041 transitions. [2022-02-11 00:36:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:05,691 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:05,691 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:05,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:05,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:05,896 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:05,896 INFO L85 PathProgramCache]: Analyzing trace with hash -982731473, now seen corresponding path program 176 times [2022-02-11 00:36:05,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:05,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843653335] [2022-02-11 00:36:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:05,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:05,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:05,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843653335] [2022-02-11 00:36:05,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843653335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:05,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255342388] [2022-02-11 00:36:05,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:36:05,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:05,972 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-11 00:36:06,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:06,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:06,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:06,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-11 00:36:06,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:36:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:06,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:06,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:06,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:06,697 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:06,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:06,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:06,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255342388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:06,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:06,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:06,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691163895] [2022-02-11 00:36:06,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:06,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:06,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:06,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:06,705 INFO L87 Difference]: Start difference. First operand 351 states and 1041 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:07,188 INFO L93 Difference]: Finished difference Result 592 states and 1662 transitions. [2022-02-11 00:36:07,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:07,188 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:07,189 INFO L225 Difference]: With dead ends: 592 [2022-02-11 00:36:07,189 INFO L226 Difference]: Without dead ends: 580 [2022-02-11 00:36:07,189 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:36:07,189 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:07,189 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 242 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:36:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-11 00:36:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 331. [2022-02-11 00:36:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9727272727272727) internal successors, (981), 330 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 981 transitions. [2022-02-11 00:36:07,193 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 981 transitions. Word has length 22 [2022-02-11 00:36:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:07,193 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 981 transitions. [2022-02-11 00:36:07,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 981 transitions. [2022-02-11 00:36:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:07,194 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:07,194 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:07,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:07,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:07,403 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash 396074085, now seen corresponding path program 177 times [2022-02-11 00:36:07,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:07,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341216437] [2022-02-11 00:36:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:07,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:07,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341216437] [2022-02-11 00:36:07,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341216437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:07,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078559855] [2022-02-11 00:36:07,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:36:07,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:07,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:07,484 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:07,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-11 00:36:07,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:36:07,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:07,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:07,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:07,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:08,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:08,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:08,208 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:08,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:08,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:08,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078559855] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:08,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:08,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:08,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144529964] [2022-02-11 00:36:08,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:08,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:08,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:08,215 INFO L87 Difference]: Start difference. First operand 331 states and 981 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:08,518 INFO L93 Difference]: Finished difference Result 460 states and 1345 transitions. [2022-02-11 00:36:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:36:08,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:08,519 INFO L225 Difference]: With dead ends: 460 [2022-02-11 00:36:08,519 INFO L226 Difference]: Without dead ends: 440 [2022-02-11 00:36:08,520 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:36:08,520 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:08,520 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 158 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-11 00:36:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 337. [2022-02-11 00:36:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9583333333333335) internal successors, (994), 336 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 994 transitions. [2022-02-11 00:36:08,524 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 994 transitions. Word has length 22 [2022-02-11 00:36:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:08,524 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 994 transitions. [2022-02-11 00:36:08,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 994 transitions. [2022-02-11 00:36:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:08,524 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:08,524 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:08,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:08,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:08,739 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1363215055, now seen corresponding path program 178 times [2022-02-11 00:36:08,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:08,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980394603] [2022-02-11 00:36:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:08,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:08,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980394603] [2022-02-11 00:36:08,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980394603] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:08,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34367521] [2022-02-11 00:36:08,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:08,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:08,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:08,795 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:08,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-11 00:36:09,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:09,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:09,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:09,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:09,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-02-11 00:36:09,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-11 00:36:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:09,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:09,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:09,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:09,521 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:09,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:09,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:09,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34367521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:09,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:09,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:09,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047792893] [2022-02-11 00:36:09,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:09,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:09,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:09,528 INFO L87 Difference]: Start difference. First operand 337 states and 994 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:09,904 INFO L93 Difference]: Finished difference Result 538 states and 1523 transitions. [2022-02-11 00:36:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:36:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:09,905 INFO L225 Difference]: With dead ends: 538 [2022-02-11 00:36:09,905 INFO L226 Difference]: Without dead ends: 528 [2022-02-11 00:36:09,906 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:36:09,906 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 187 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:09,906 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 188 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-11 00:36:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 359. [2022-02-11 00:36:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.9553072625698324) internal successors, (1058), 358 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1058 transitions. [2022-02-11 00:36:09,910 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1058 transitions. Word has length 22 [2022-02-11 00:36:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:09,910 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1058 transitions. [2022-02-11 00:36:09,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1058 transitions. [2022-02-11 00:36:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:09,910 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:09,910 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:09,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:10,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:10,119 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1350980325, now seen corresponding path program 179 times [2022-02-11 00:36:10,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:10,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788045043] [2022-02-11 00:36:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:10,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:10,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:10,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788045043] [2022-02-11 00:36:10,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788045043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:10,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894495749] [2022-02-11 00:36:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:10,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:10,200 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:10,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-11 00:36:10,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:36:10,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:10,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:10,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:10,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-02-11 00:36:10,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-11 00:36:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:10,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:10,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:10,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:36:10,888 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:10,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:10,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:10,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894495749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:10,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:10,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:10,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062778355] [2022-02-11 00:36:10,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:10,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:10,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:10,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:10,896 INFO L87 Difference]: Start difference. First operand 359 states and 1058 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:11,205 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2022-02-11 00:36:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:36:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:11,206 INFO L225 Difference]: With dead ends: 495 [2022-02-11 00:36:11,206 INFO L226 Difference]: Without dead ends: 480 [2022-02-11 00:36:11,206 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:11,206 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:11,206 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 179 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-02-11 00:36:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 333. [2022-02-11 00:36:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.966867469879518) internal successors, (985), 332 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 985 transitions. [2022-02-11 00:36:11,210 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 985 transitions. Word has length 22 [2022-02-11 00:36:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:11,210 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 985 transitions. [2022-02-11 00:36:11,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 985 transitions. [2022-02-11 00:36:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:11,211 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:11,211 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:11,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:11,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:11,427 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash -24051833, now seen corresponding path program 180 times [2022-02-11 00:36:11,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:11,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47980842] [2022-02-11 00:36:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:11,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:11,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:11,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47980842] [2022-02-11 00:36:11,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47980842] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:11,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065722911] [2022-02-11 00:36:11,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:36:11,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:11,482 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:11,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-11 00:36:11,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:36:11,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:11,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:11,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:11,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:11,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:11,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:11,969 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:11,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:11,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:11,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065722911] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:11,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:11,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:36:11,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664684639] [2022-02-11 00:36:11,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:11,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:36:11,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:11,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:36:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:36:11,974 INFO L87 Difference]: Start difference. First operand 333 states and 985 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:12,134 INFO L93 Difference]: Finished difference Result 476 states and 1373 transitions. [2022-02-11 00:36:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:12,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:12,134 INFO L225 Difference]: With dead ends: 476 [2022-02-11 00:36:12,134 INFO L226 Difference]: Without dead ends: 476 [2022-02-11 00:36:12,135 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:12,135 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:12,135 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 138 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:36:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-11 00:36:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 336. [2022-02-11 00:36:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.952238805970149) internal successors, (989), 335 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 989 transitions. [2022-02-11 00:36:12,139 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 989 transitions. Word has length 22 [2022-02-11 00:36:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:12,139 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 989 transitions. [2022-02-11 00:36:12,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 989 transitions. [2022-02-11 00:36:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:12,139 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:12,139 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:12,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-02-11 00:36:12,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-02-11 00:36:12,343 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1470551131, now seen corresponding path program 181 times [2022-02-11 00:36:12,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:12,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314945139] [2022-02-11 00:36:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:12,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:12,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314945139] [2022-02-11 00:36:12,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314945139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:12,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996408551] [2022-02-11 00:36:12,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:36:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:12,437 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-11 00:36:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:12,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:12,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:12,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:12,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:12,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:12,965 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:12,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:12,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:12,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996408551] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:12,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:12,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:12,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010988089] [2022-02-11 00:36:12,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:12,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:12,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:12,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:12,969 INFO L87 Difference]: Start difference. First operand 336 states and 989 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:13,227 INFO L93 Difference]: Finished difference Result 507 states and 1449 transitions. [2022-02-11 00:36:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:36:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:13,228 INFO L225 Difference]: With dead ends: 507 [2022-02-11 00:36:13,228 INFO L226 Difference]: Without dead ends: 497 [2022-02-11 00:36:13,228 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:36:13,228 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:13,228 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 199 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-02-11 00:36:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 333. [2022-02-11 00:36:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9427710843373496) internal successors, (977), 332 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 977 transitions. [2022-02-11 00:36:13,232 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 977 transitions. Word has length 22 [2022-02-11 00:36:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:13,232 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 977 transitions. [2022-02-11 00:36:13,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 977 transitions. [2022-02-11 00:36:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:13,233 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:13,233 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:13,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:13,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:13,449 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:13,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1895498341, now seen corresponding path program 182 times [2022-02-11 00:36:13,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:13,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287974863] [2022-02-11 00:36:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:13,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:13,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287974863] [2022-02-11 00:36:13,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287974863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:13,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558307482] [2022-02-11 00:36:13,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:36:13,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:13,531 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:13,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-11 00:36:13,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:13,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:13,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:13,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:13,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:14,032 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:14,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:14,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:14,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558307482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:14,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:14,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:14,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560113454] [2022-02-11 00:36:14,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:14,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:14,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:14,037 INFO L87 Difference]: Start difference. First operand 333 states and 977 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:14,284 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2022-02-11 00:36:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:36:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:14,284 INFO L225 Difference]: With dead ends: 458 [2022-02-11 00:36:14,285 INFO L226 Difference]: Without dead ends: 438 [2022-02-11 00:36:14,285 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:14,285 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:14,285 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 208 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-11 00:36:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 315. [2022-02-11 00:36:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.945859872611465) internal successors, (925), 314 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 925 transitions. [2022-02-11 00:36:14,288 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 925 transitions. Word has length 22 [2022-02-11 00:36:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:14,289 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 925 transitions. [2022-02-11 00:36:14,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 925 transitions. [2022-02-11 00:36:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:14,289 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:14,289 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:14,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-11 00:36:14,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-11 00:36:14,506 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -59659887, now seen corresponding path program 183 times [2022-02-11 00:36:14,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:14,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318770755] [2022-02-11 00:36:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:14,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:14,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318770755] [2022-02-11 00:36:14,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318770755] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:14,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805645294] [2022-02-11 00:36:14,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:36:14,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:14,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:14,596 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:14,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-11 00:36:14,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:36:14,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:14,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:14,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:15,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:15,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:15,096 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:15,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:15,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:15,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805645294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:15,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:15,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:36:15,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128419837] [2022-02-11 00:36:15,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:36:15,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:36:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:36:15,101 INFO L87 Difference]: Start difference. First operand 315 states and 925 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:15,311 INFO L93 Difference]: Finished difference Result 535 states and 1557 transitions. [2022-02-11 00:36:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:36:15,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:15,312 INFO L225 Difference]: With dead ends: 535 [2022-02-11 00:36:15,312 INFO L226 Difference]: Without dead ends: 535 [2022-02-11 00:36:15,312 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:36:15,313 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:15,313 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 175 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-11 00:36:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 327. [2022-02-11 00:36:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2022-02-11 00:36:15,317 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 22 [2022-02-11 00:36:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:15,317 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2022-02-11 00:36:15,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2022-02-11 00:36:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:15,317 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:15,317 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:15,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-02-11 00:36:15,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-11 00:36:15,526 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1434943077, now seen corresponding path program 184 times [2022-02-11 00:36:15,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:15,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104206434] [2022-02-11 00:36:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:15,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:15,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:15,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104206434] [2022-02-11 00:36:15,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104206434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:15,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254784827] [2022-02-11 00:36:15,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:15,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:15,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:15,603 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:15,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-11 00:36:15,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:15,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:15,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:15,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:15,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:16,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:16,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:16,114 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:16,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:16,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:16,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254784827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:16,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:16,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:16,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424183035] [2022-02-11 00:36:16,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:16,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:16,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:16,119 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:16,304 INFO L93 Difference]: Finished difference Result 511 states and 1483 transitions. [2022-02-11 00:36:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:16,306 INFO L225 Difference]: With dead ends: 511 [2022-02-11 00:36:16,306 INFO L226 Difference]: Without dead ends: 501 [2022-02-11 00:36:16,306 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:36:16,306 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:16,306 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:36:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-11 00:36:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 334. [2022-02-11 00:36:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.963963963963964) internal successors, (987), 333 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 987 transitions. [2022-02-11 00:36:16,310 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 987 transitions. Word has length 22 [2022-02-11 00:36:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:16,310 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 987 transitions. [2022-02-11 00:36:16,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 987 transitions. [2022-02-11 00:36:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:16,311 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:16,311 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:16,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:16,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-11 00:36:16,528 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1115830757, now seen corresponding path program 185 times [2022-02-11 00:36:16,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:16,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214110033] [2022-02-11 00:36:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:16,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:16,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214110033] [2022-02-11 00:36:16,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214110033] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:16,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992271914] [2022-02-11 00:36:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:16,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:16,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:16,607 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:16,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-11 00:36:16,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:16,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:16,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:17,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:17,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:17,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:17,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:17,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:17,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992271914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:17,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:17,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:17,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77473188] [2022-02-11 00:36:17,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:17,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:17,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:17,181 INFO L87 Difference]: Start difference. First operand 334 states and 987 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:17,443 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2022-02-11 00:36:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:17,444 INFO L225 Difference]: With dead ends: 435 [2022-02-11 00:36:17,444 INFO L226 Difference]: Without dead ends: 435 [2022-02-11 00:36:17,444 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:36:17,444 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:17,444 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 187 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-11 00:36:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 312. [2022-02-11 00:36:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2022-02-11 00:36:17,447 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 22 [2022-02-11 00:36:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:17,448 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2022-02-11 00:36:17,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2022-02-11 00:36:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:17,448 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:17,448 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:17,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:17,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:17,665 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1546790043, now seen corresponding path program 186 times [2022-02-11 00:36:17,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:17,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177315230] [2022-02-11 00:36:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:17,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:17,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:17,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177315230] [2022-02-11 00:36:17,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177315230] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:17,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644610794] [2022-02-11 00:36:17,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:36:17,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:17,757 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:17,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-11 00:36:17,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:36:17,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:18,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:18,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:36:18,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:36:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:18,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:18,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:18,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:18,429 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:18,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:18,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:18,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644610794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:18,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:18,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:36:18,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055533967] [2022-02-11 00:36:18,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:18,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:36:18,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:18,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:36:18,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:36:18,435 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:18,819 INFO L93 Difference]: Finished difference Result 691 states and 1976 transitions. [2022-02-11 00:36:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:36:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:18,820 INFO L225 Difference]: With dead ends: 691 [2022-02-11 00:36:18,820 INFO L226 Difference]: Without dead ends: 691 [2022-02-11 00:36:18,821 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:36:18,821 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:18,821 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 235 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-11 00:36:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 326. [2022-02-11 00:36:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0123076923076924) internal successors, (979), 325 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 979 transitions. [2022-02-11 00:36:18,825 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 979 transitions. Word has length 22 [2022-02-11 00:36:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:18,825 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 979 transitions. [2022-02-11 00:36:18,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 979 transitions. [2022-02-11 00:36:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:18,826 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:18,826 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:18,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-02-11 00:36:19,032 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash -52187079, now seen corresponding path program 187 times [2022-02-11 00:36:19,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:19,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365833325] [2022-02-11 00:36:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:19,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:19,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365833325] [2022-02-11 00:36:19,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365833325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:19,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167874226] [2022-02-11 00:36:19,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:36:19,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:19,124 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:19,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-11 00:36:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:19,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:19,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:36:19,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:36:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:19,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:19,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:19,769 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:19,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:19,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:19,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167874226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:19,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:19,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:19,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600241234] [2022-02-11 00:36:19,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:19,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:19,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:19,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:19,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:19,775 INFO L87 Difference]: Start difference. First operand 326 states and 979 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:20,132 INFO L93 Difference]: Finished difference Result 743 states and 2090 transitions. [2022-02-11 00:36:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:36:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:20,133 INFO L225 Difference]: With dead ends: 743 [2022-02-11 00:36:20,133 INFO L226 Difference]: Without dead ends: 733 [2022-02-11 00:36:20,133 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:36:20,133 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 258 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:20,133 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 198 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-11 00:36:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 333. [2022-02-11 00:36:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9909638554216866) internal successors, (993), 332 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 993 transitions. [2022-02-11 00:36:20,138 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 993 transitions. Word has length 22 [2022-02-11 00:36:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:20,138 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 993 transitions. [2022-02-11 00:36:20,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 993 transitions. [2022-02-11 00:36:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:20,138 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:20,139 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:20,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-11 00:36:20,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-11 00:36:20,355 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 988888113, now seen corresponding path program 188 times [2022-02-11 00:36:20,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:20,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693977398] [2022-02-11 00:36:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:20,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:20,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:20,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693977398] [2022-02-11 00:36:20,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693977398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:20,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705153469] [2022-02-11 00:36:20,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:36:20,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:20,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:20,436 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:20,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-11 00:36:20,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:20,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:20,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:20,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:20,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:36:20,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:36:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:20,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:21,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:21,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:21,082 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:21,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:21,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:21,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705153469] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:21,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:21,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:36:21,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201520825] [2022-02-11 00:36:21,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:21,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:36:21,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:36:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:36:21,089 INFO L87 Difference]: Start difference. First operand 333 states and 993 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:21,475 INFO L93 Difference]: Finished difference Result 700 states and 2006 transitions. [2022-02-11 00:36:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:36:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:21,476 INFO L225 Difference]: With dead ends: 700 [2022-02-11 00:36:21,476 INFO L226 Difference]: Without dead ends: 700 [2022-02-11 00:36:21,476 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:36:21,476 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:21,476 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 174 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-02-11 00:36:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 339. [2022-02-11 00:36:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0177514792899407) internal successors, (1020), 338 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1020 transitions. [2022-02-11 00:36:21,481 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1020 transitions. Word has length 22 [2022-02-11 00:36:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:21,481 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1020 transitions. [2022-02-11 00:36:21,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1020 transitions. [2022-02-11 00:36:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:21,482 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:21,482 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:21,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:21,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-02-11 00:36:21,682 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1087941191, now seen corresponding path program 189 times [2022-02-11 00:36:21,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:21,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122327969] [2022-02-11 00:36:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:21,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:21,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122327969] [2022-02-11 00:36:21,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122327969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:21,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587600816] [2022-02-11 00:36:21,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:36:21,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:21,777 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:21,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-11 00:36:21,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:36:21,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:22,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:22,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:36:22,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:36:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:22,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:22,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:22,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:22,404 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:22,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:22,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:22,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587600816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:22,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:22,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:22,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727668273] [2022-02-11 00:36:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:22,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:22,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:22,409 INFO L87 Difference]: Start difference. First operand 339 states and 1020 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:22,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:22,683 INFO L93 Difference]: Finished difference Result 649 states and 1853 transitions. [2022-02-11 00:36:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:22,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:22,684 INFO L225 Difference]: With dead ends: 649 [2022-02-11 00:36:22,684 INFO L226 Difference]: Without dead ends: 640 [2022-02-11 00:36:22,684 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:36:22,684 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 211 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:22,684 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 154 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-02-11 00:36:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2022-02-11 00:36:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0) internal successors, (1032), 344 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1032 transitions. [2022-02-11 00:36:22,689 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1032 transitions. Word has length 22 [2022-02-11 00:36:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:22,689 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1032 transitions. [2022-02-11 00:36:22,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1032 transitions. [2022-02-11 00:36:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:22,689 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:22,689 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:22,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:22,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:22,892 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash -745691697, now seen corresponding path program 190 times [2022-02-11 00:36:22,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:22,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720733581] [2022-02-11 00:36:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:22,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:22,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:22,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720733581] [2022-02-11 00:36:22,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720733581] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:22,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790973506] [2022-02-11 00:36:22,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:22,984 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:22,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-11 00:36:23,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:23,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:23,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:23,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-02-11 00:36:23,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-02-11 00:36:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:23,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:23,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:23,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:23,586 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:23,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:23,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:23,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790973506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:23,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:23,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:23,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546657315] [2022-02-11 00:36:23,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:23,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:23,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:23,591 INFO L87 Difference]: Start difference. First operand 345 states and 1032 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:23,834 INFO L93 Difference]: Finished difference Result 662 states and 1863 transitions. [2022-02-11 00:36:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:23,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:23,835 INFO L225 Difference]: With dead ends: 662 [2022-02-11 00:36:23,835 INFO L226 Difference]: Without dead ends: 652 [2022-02-11 00:36:23,835 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:23,835 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 193 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:23,835 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 162 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:36:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-02-11 00:36:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 357. [2022-02-11 00:36:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.00561797752809) internal successors, (1070), 356 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1070 transitions. [2022-02-11 00:36:23,840 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1070 transitions. Word has length 22 [2022-02-11 00:36:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:23,840 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1070 transitions. [2022-02-11 00:36:23,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1070 transitions. [2022-02-11 00:36:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:23,841 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:23,841 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:23,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:24,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:24,057 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1968503683, now seen corresponding path program 191 times [2022-02-11 00:36:24,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:24,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955780848] [2022-02-11 00:36:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:24,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:24,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955780848] [2022-02-11 00:36:24,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955780848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:24,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690798749] [2022-02-11 00:36:24,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:24,117 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:24,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-11 00:36:24,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:36:24,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:24,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:24,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:24,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-02-11 00:36:24,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-11 00:36:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:24,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:24,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:24,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-11 00:36:24,598 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:24,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:24,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:24,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690798749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:24,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:24,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:24,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216666391] [2022-02-11 00:36:24,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:24,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:24,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:24,602 INFO L87 Difference]: Start difference. First operand 357 states and 1070 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:24,838 INFO L93 Difference]: Finished difference Result 576 states and 1655 transitions. [2022-02-11 00:36:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:24,839 INFO L225 Difference]: With dead ends: 576 [2022-02-11 00:36:24,839 INFO L226 Difference]: Without dead ends: 564 [2022-02-11 00:36:24,840 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:24,840 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:24,840 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 178 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:36:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-02-11 00:36:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 353. [2022-02-11 00:36:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0056818181818183) internal successors, (1058), 352 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1058 transitions. [2022-02-11 00:36:24,844 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1058 transitions. Word has length 22 [2022-02-11 00:36:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:24,844 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1058 transitions. [2022-02-11 00:36:24,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1058 transitions. [2022-02-11 00:36:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:24,845 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:24,845 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:24,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:25,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:25,061 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1687399163, now seen corresponding path program 192 times [2022-02-11 00:36:25,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:25,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971294317] [2022-02-11 00:36:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:25,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:25,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971294317] [2022-02-11 00:36:25,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971294317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:25,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728473640] [2022-02-11 00:36:25,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:36:25,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:25,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:25,125 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:25,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-11 00:36:25,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:36:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:25,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:25,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:25,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:25,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:25,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:25,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:25,824 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:25,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:25,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:25,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728473640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:25,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:25,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:36:25,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588552847] [2022-02-11 00:36:25,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:25,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:36:25,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:36:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:36:25,830 INFO L87 Difference]: Start difference. First operand 353 states and 1058 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:26,159 INFO L93 Difference]: Finished difference Result 575 states and 1670 transitions. [2022-02-11 00:36:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-11 00:36:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:26,160 INFO L225 Difference]: With dead ends: 575 [2022-02-11 00:36:26,160 INFO L226 Difference]: Without dead ends: 575 [2022-02-11 00:36:26,160 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:36:26,160 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 152 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:26,160 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 175 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-11 00:36:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 358. [2022-02-11 00:36:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2022-02-11 00:36:26,165 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2022-02-11 00:36:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:26,165 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2022-02-11 00:36:26,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2022-02-11 00:36:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:26,165 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:26,165 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:26,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:26,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-11 00:36:26,375 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:26,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1112965169, now seen corresponding path program 193 times [2022-02-11 00:36:26,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:26,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197540111] [2022-02-11 00:36:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:26,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:26,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:26,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197540111] [2022-02-11 00:36:26,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197540111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:26,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572743834] [2022-02-11 00:36:26,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:36:26,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:26,440 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:26,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-11 00:36:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:26,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:26,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:26,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-02-11 00:36:26,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-02-11 00:36:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:26,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:26,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:26,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:26,937 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:26,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:26,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:26,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572743834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:26,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:26,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:26,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341679945] [2022-02-11 00:36:26,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:26,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:26,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:26,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:26,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:26,942 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:27,188 INFO L93 Difference]: Finished difference Result 551 states and 1605 transitions. [2022-02-11 00:36:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:27,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:27,190 INFO L225 Difference]: With dead ends: 551 [2022-02-11 00:36:27,190 INFO L226 Difference]: Without dead ends: 541 [2022-02-11 00:36:27,190 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:27,190 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:27,190 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 174 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-02-11 00:36:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 337. [2022-02-11 00:36:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9702380952380953) internal successors, (998), 336 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 998 transitions. [2022-02-11 00:36:27,194 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 998 transitions. Word has length 22 [2022-02-11 00:36:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:27,194 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 998 transitions. [2022-02-11 00:36:27,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 998 transitions. [2022-02-11 00:36:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:27,195 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:27,195 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:27,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:27,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-11 00:36:27,409 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1638885455, now seen corresponding path program 194 times [2022-02-11 00:36:27,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:27,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751508408] [2022-02-11 00:36:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:27,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:27,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:27,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751508408] [2022-02-11 00:36:27,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751508408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:27,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234293510] [2022-02-11 00:36:27,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:36:27,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:27,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:27,492 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:27,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-11 00:36:27,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:27,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:27,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:27,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:27,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:28,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:28,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:28,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:28,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:28,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:28,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234293510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:28,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:28,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:28,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627792762] [2022-02-11 00:36:28,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:28,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:28,181 INFO L87 Difference]: Start difference. First operand 337 states and 998 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:28,503 INFO L93 Difference]: Finished difference Result 480 states and 1423 transitions. [2022-02-11 00:36:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:28,504 INFO L225 Difference]: With dead ends: 480 [2022-02-11 00:36:28,504 INFO L226 Difference]: Without dead ends: 480 [2022-02-11 00:36:28,504 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:28,505 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:28,505 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-02-11 00:36:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 334. [2022-02-11 00:36:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.96996996996997) internal successors, (989), 333 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 989 transitions. [2022-02-11 00:36:28,508 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 989 transitions. Word has length 22 [2022-02-11 00:36:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:28,508 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 989 transitions. [2022-02-11 00:36:28,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 989 transitions. [2022-02-11 00:36:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:28,509 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:28,509 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:28,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:28,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-11 00:36:28,726 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1132668067, now seen corresponding path program 195 times [2022-02-11 00:36:28,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:28,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891911224] [2022-02-11 00:36:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:28,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:28,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:28,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891911224] [2022-02-11 00:36:28,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891911224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:28,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626918428] [2022-02-11 00:36:28,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:36:28,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:28,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:28,808 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:28,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-11 00:36:29,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:36:29,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 00:36:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:29,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:36:29,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2022-02-11 00:36:29,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-02-11 00:36:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:36:29,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:29,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2022-02-11 00:36:29,957 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:29,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:29,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:36:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:36:29,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626918428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:29,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:29,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-02-11 00:36:29,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733744090] [2022-02-11 00:36:29,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:29,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:36:29,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:36:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:36:29,964 INFO L87 Difference]: Start difference. First operand 334 states and 989 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:30,417 INFO L93 Difference]: Finished difference Result 785 states and 2241 transitions. [2022-02-11 00:36:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:36:30,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:30,418 INFO L225 Difference]: With dead ends: 785 [2022-02-11 00:36:30,418 INFO L226 Difference]: Without dead ends: 734 [2022-02-11 00:36:30,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:36:30,419 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:30,419 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 194 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-02-11 00:36:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 354. [2022-02-11 00:36:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.028328611898017) internal successors, (1069), 353 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1069 transitions. [2022-02-11 00:36:30,423 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1069 transitions. Word has length 22 [2022-02-11 00:36:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:30,423 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1069 transitions. [2022-02-11 00:36:30,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1069 transitions. [2022-02-11 00:36:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:30,424 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:30,424 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:30,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:30,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-11 00:36:30,624 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:30,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1085469925, now seen corresponding path program 196 times [2022-02-11 00:36:30,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:30,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538766554] [2022-02-11 00:36:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:30,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:30,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:30,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538766554] [2022-02-11 00:36:30,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538766554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:30,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719219361] [2022-02-11 00:36:30,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:30,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:30,720 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:30,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-11 00:36:30,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:30,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:30,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:30,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:31,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:31,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:31,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:31,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:31,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:31,336 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:31,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:31,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:31,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719219361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:31,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:31,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:31,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148882667] [2022-02-11 00:36:31,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:31,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:31,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:31,342 INFO L87 Difference]: Start difference. First operand 354 states and 1069 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:31,613 INFO L93 Difference]: Finished difference Result 485 states and 1410 transitions. [2022-02-11 00:36:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:31,614 INFO L225 Difference]: With dead ends: 485 [2022-02-11 00:36:31,614 INFO L226 Difference]: Without dead ends: 476 [2022-02-11 00:36:31,614 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:31,614 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:31,614 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 175 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-11 00:36:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 362. [2022-02-11 00:36:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.011080332409972) internal successors, (1087), 361 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1087 transitions. [2022-02-11 00:36:31,619 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1087 transitions. Word has length 22 [2022-02-11 00:36:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:31,619 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1087 transitions. [2022-02-11 00:36:31,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1087 transitions. [2022-02-11 00:36:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:31,620 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:31,620 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:31,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:31,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-02-11 00:36:31,837 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1049870599, now seen corresponding path program 197 times [2022-02-11 00:36:31,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:31,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784391657] [2022-02-11 00:36:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:31,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:31,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:31,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784391657] [2022-02-11 00:36:31,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784391657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:31,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401794698] [2022-02-11 00:36:31,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:31,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:31,924 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:31,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-11 00:36:32,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:36:32,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:32,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:32,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:32,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:32,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:32,630 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:36:32,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:36:32,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:32,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401794698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:32,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:32,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:32,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187766137] [2022-02-11 00:36:32,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:32,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:32,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:32,637 INFO L87 Difference]: Start difference. First operand 362 states and 1087 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:32,894 INFO L93 Difference]: Finished difference Result 449 states and 1342 transitions. [2022-02-11 00:36:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-11 00:36:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:32,895 INFO L225 Difference]: With dead ends: 449 [2022-02-11 00:36:32,895 INFO L226 Difference]: Without dead ends: 449 [2022-02-11 00:36:32,895 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:32,895 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:32,895 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 121 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-11 00:36:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 329. [2022-02-11 00:36:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2022-02-11 00:36:32,899 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2022-02-11 00:36:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:32,899 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2022-02-11 00:36:32,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2022-02-11 00:36:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:32,900 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:32,900 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:32,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:33,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:33,100 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2103683403, now seen corresponding path program 198 times [2022-02-11 00:36:33,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:33,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711581334] [2022-02-11 00:36:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:33,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:36:33,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:33,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711581334] [2022-02-11 00:36:33,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711581334] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:33,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183551221] [2022-02-11 00:36:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:36:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:33,168 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:33,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-11 00:36:33,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:36:33,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:33,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:33,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:33,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:33,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:33,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:36:33,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:33,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:33,707 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:33,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:33,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183551221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:33,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:33,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-02-11 00:36:33,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139526354] [2022-02-11 00:36:33,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:33,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:33,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:33,711 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:34,625 INFO L93 Difference]: Finished difference Result 1265 states and 3638 transitions. [2022-02-11 00:36:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:36:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:34,626 INFO L225 Difference]: With dead ends: 1265 [2022-02-11 00:36:34,626 INFO L226 Difference]: Without dead ends: 1115 [2022-02-11 00:36:34,627 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:36:34,627 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 239 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:34,627 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 497 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:36:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-02-11 00:36:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 339. [2022-02-11 00:36:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2022-02-11 00:36:34,633 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2022-02-11 00:36:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:34,633 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2022-02-11 00:36:34,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2022-02-11 00:36:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:34,633 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:34,633 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:34,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-02-11 00:36:34,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-02-11 00:36:34,839 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1885422411, now seen corresponding path program 199 times [2022-02-11 00:36:34,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:34,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501964627] [2022-02-11 00:36:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:34,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:36:34,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:34,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501964627] [2022-02-11 00:36:34,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501964627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:34,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131147407] [2022-02-11 00:36:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:36:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:34,884 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:34,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-11 00:36:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:35,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:35,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:35,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:35,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:35,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-02-11 00:36:35,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:35,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:35,452 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:35,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:35,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131147407] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:35,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:35,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-02-11 00:36:35,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810138121] [2022-02-11 00:36:35,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:35,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:35,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:35,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:35,458 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:36,609 INFO L93 Difference]: Finished difference Result 1036 states and 3022 transitions. [2022-02-11 00:36:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:36:36,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:36,610 INFO L225 Difference]: With dead ends: 1036 [2022-02-11 00:36:36,610 INFO L226 Difference]: Without dead ends: 934 [2022-02-11 00:36:36,611 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=602, Invalid=2478, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:36:36,611 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 188 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:36,611 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 596 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:36:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-02-11 00:36:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 304. [2022-02-11 00:36:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-02-11 00:36:36,615 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-02-11 00:36:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:36,616 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-02-11 00:36:36,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-02-11 00:36:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:36,616 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:36,616 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:36,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:36,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-11 00:36:36,833 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:36,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2078687993, now seen corresponding path program 200 times [2022-02-11 00:36:36,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:36,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446020291] [2022-02-11 00:36:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:36,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:36,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:36,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446020291] [2022-02-11 00:36:36,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446020291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:36,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433161643] [2022-02-11 00:36:36,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:36:36,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:36,932 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:36,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-11 00:36:37,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:37,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:37,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:37,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-02-11 00:36:37,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:37,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:37,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:37,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:37,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:37,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:37,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:37,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:37,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:37,605 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:37,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:37,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433161643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:37,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:37,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:36:37,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306618076] [2022-02-11 00:36:37,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:37,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:36:37,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:36:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:36:37,614 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:37,778 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2022-02-11 00:36:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:37,779 INFO L225 Difference]: With dead ends: 455 [2022-02-11 00:36:37,779 INFO L226 Difference]: Without dead ends: 455 [2022-02-11 00:36:37,779 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:36:37,779 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 89 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:37,779 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 144 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 224 Unchecked, 0.1s Time] [2022-02-11 00:36:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-11 00:36:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 318. [2022-02-11 00:36:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.965299684542587) internal successors, (940), 317 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 940 transitions. [2022-02-11 00:36:37,783 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 940 transitions. Word has length 22 [2022-02-11 00:36:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:37,783 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 940 transitions. [2022-02-11 00:36:37,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 940 transitions. [2022-02-11 00:36:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:37,783 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:37,783 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:37,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-11 00:36:37,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:37,995 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:37,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1709203663, now seen corresponding path program 201 times [2022-02-11 00:36:37,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:37,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292144035] [2022-02-11 00:36:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:38,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:38,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292144035] [2022-02-11 00:36:38,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292144035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:38,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457664010] [2022-02-11 00:36:38,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:36:38,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:38,113 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:38,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-11 00:36:38,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:36:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:38,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:38,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-02-11 00:36:38,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:38,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:38,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:38,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:38,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:38,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:38,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:38,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:38,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:38,861 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:38,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:38,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457664010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:38,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:38,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:38,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238557989] [2022-02-11 00:36:38,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:38,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:38,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:38,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:38,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:38,867 INFO L87 Difference]: Start difference. First operand 318 states and 940 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:39,119 INFO L93 Difference]: Finished difference Result 485 states and 1414 transitions. [2022-02-11 00:36:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:36:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:39,120 INFO L225 Difference]: With dead ends: 485 [2022-02-11 00:36:39,120 INFO L226 Difference]: Without dead ends: 476 [2022-02-11 00:36:39,120 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:36:39,120 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:39,120 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 172 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 429 Invalid, 0 Unknown, 273 Unchecked, 0.1s Time] [2022-02-11 00:36:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-11 00:36:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 336. [2022-02-11 00:36:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.976119402985075) internal successors, (997), 335 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 997 transitions. [2022-02-11 00:36:39,124 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 997 transitions. Word has length 22 [2022-02-11 00:36:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:39,124 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 997 transitions. [2022-02-11 00:36:39,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 997 transitions. [2022-02-11 00:36:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:39,125 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:39,125 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:39,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:39,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:39,342 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:39,342 INFO L85 PathProgramCache]: Analyzing trace with hash -696511131, now seen corresponding path program 202 times [2022-02-11 00:36:39,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:39,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600592079] [2022-02-11 00:36:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:39,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:39,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:39,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600592079] [2022-02-11 00:36:39,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600592079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:39,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319212570] [2022-02-11 00:36:39,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:39,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:39,393 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:39,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-11 00:36:39,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:39,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:39,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-02-11 00:36:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:39,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:39,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:39,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:39,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:39,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:39,890 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:39,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:39,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319212570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:39,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:39,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:36:39,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15706283] [2022-02-11 00:36:39,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:39,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:36:39,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:39,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:36:39,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:36:39,899 INFO L87 Difference]: Start difference. First operand 336 states and 997 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:40,312 INFO L93 Difference]: Finished difference Result 568 states and 1645 transitions. [2022-02-11 00:36:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:36:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:40,313 INFO L225 Difference]: With dead ends: 568 [2022-02-11 00:36:40,313 INFO L226 Difference]: Without dead ends: 428 [2022-02-11 00:36:40,313 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:36:40,313 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:40,313 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 220 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-11 00:36:40,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 348. [2022-02-11 00:36:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.962536023054755) internal successors, (1028), 347 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1028 transitions. [2022-02-11 00:36:40,317 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1028 transitions. Word has length 22 [2022-02-11 00:36:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:40,317 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1028 transitions. [2022-02-11 00:36:40,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1028 transitions. [2022-02-11 00:36:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:40,317 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:40,318 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:40,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-02-11 00:36:40,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-02-11 00:36:40,534 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1038452195, now seen corresponding path program 203 times [2022-02-11 00:36:40,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:40,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262417184] [2022-02-11 00:36:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:40,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:40,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:40,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262417184] [2022-02-11 00:36:40,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262417184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:40,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894388591] [2022-02-11 00:36:40,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:40,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:40,597 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:40,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-11 00:36:40,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:40,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:40,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:40,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:40,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:40,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:40,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:41,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:41,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:41,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-11 00:36:41,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:41,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:41,140 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:41,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:41,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894388591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:41,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:41,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:41,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427731138] [2022-02-11 00:36:41,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:41,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:41,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:41,147 INFO L87 Difference]: Start difference. First operand 348 states and 1028 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:41,609 INFO L93 Difference]: Finished difference Result 798 states and 2298 transitions. [2022-02-11 00:36:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:36:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:41,611 INFO L225 Difference]: With dead ends: 798 [2022-02-11 00:36:41,611 INFO L226 Difference]: Without dead ends: 731 [2022-02-11 00:36:41,611 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:36:41,611 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:41,611 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 312 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1203 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-02-11 00:36:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-02-11 00:36:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 376. [2022-02-11 00:36:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.04) internal successors, (1140), 375 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1140 transitions. [2022-02-11 00:36:41,616 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1140 transitions. Word has length 22 [2022-02-11 00:36:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:41,616 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1140 transitions. [2022-02-11 00:36:41,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1140 transitions. [2022-02-11 00:36:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:41,617 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:41,617 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:41,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:41,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-02-11 00:36:41,835 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash -668967865, now seen corresponding path program 204 times [2022-02-11 00:36:41,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:41,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612375261] [2022-02-11 00:36:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:41,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:36:41,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:41,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612375261] [2022-02-11 00:36:41,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612375261] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:41,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026310712] [2022-02-11 00:36:41,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:36:41,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:41,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:41,922 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:41,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-11 00:36:42,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:36:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:42,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:42,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:42,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:42,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:42,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:42,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:42,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:42,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:42,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:42,618 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:42,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:42,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026310712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:42,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:42,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-02-11 00:36:42,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746775724] [2022-02-11 00:36:42,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:42,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:36:42,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:36:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:36:42,629 INFO L87 Difference]: Start difference. First operand 376 states and 1140 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:43,005 INFO L93 Difference]: Finished difference Result 681 states and 1981 transitions. [2022-02-11 00:36:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:36:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:43,006 INFO L225 Difference]: With dead ends: 681 [2022-02-11 00:36:43,006 INFO L226 Difference]: Without dead ends: 585 [2022-02-11 00:36:43,006 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:43,006 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:43,006 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 236 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 973 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-02-11 00:36:43,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-02-11 00:36:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 388. [2022-02-11 00:36:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.020671834625323) internal successors, (1169), 387 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1169 transitions. [2022-02-11 00:36:43,011 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1169 transitions. Word has length 22 [2022-02-11 00:36:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:43,011 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1169 transitions. [2022-02-11 00:36:43,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1169 transitions. [2022-02-11 00:36:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:43,012 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:43,012 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:43,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-02-11 00:36:43,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:43,223 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash -450706873, now seen corresponding path program 205 times [2022-02-11 00:36:43,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:43,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516172926] [2022-02-11 00:36:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:43,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:43,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:43,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516172926] [2022-02-11 00:36:43,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516172926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:43,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151363003] [2022-02-11 00:36:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:36:43,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:43,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:43,330 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:43,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-11 00:36:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:43,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:43,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:43,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:43,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:43,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:43,957 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:43,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:43,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151363003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:43,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:43,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:36:43,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052823480] [2022-02-11 00:36:43,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:43,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:43,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:43,966 INFO L87 Difference]: Start difference. First operand 388 states and 1169 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:44,153 INFO L93 Difference]: Finished difference Result 472 states and 1418 transitions. [2022-02-11 00:36:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:44,154 INFO L225 Difference]: With dead ends: 472 [2022-02-11 00:36:44,154 INFO L226 Difference]: Without dead ends: 472 [2022-02-11 00:36:44,154 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:36:44,154 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:44,154 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 129 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 440 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-02-11 00:36:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-11 00:36:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 389. [2022-02-11 00:36:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.0231958762886597) internal successors, (1173), 388 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1173 transitions. [2022-02-11 00:36:44,159 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1173 transitions. Word has length 22 [2022-02-11 00:36:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:44,159 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1173 transitions. [2022-02-11 00:36:44,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1173 transitions. [2022-02-11 00:36:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:44,159 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:44,159 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:44,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:44,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-02-11 00:36:44,375 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash 307691045, now seen corresponding path program 206 times [2022-02-11 00:36:44,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:44,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183844280] [2022-02-11 00:36:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:44,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:44,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183844280] [2022-02-11 00:36:44,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183844280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:44,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662611821] [2022-02-11 00:36:44,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:36:44,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:44,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:44,469 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:44,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-11 00:36:44,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:44,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:44,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:44,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-02-11 00:36:44,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:44,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:44,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:44,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:44,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:45,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:45,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:45,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:45,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:45,140 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:45,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:45,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662611821] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:45,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:45,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:45,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643562665] [2022-02-11 00:36:45,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:45,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:45,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:45,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:45,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:45,149 INFO L87 Difference]: Start difference. First operand 389 states and 1173 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:45,515 INFO L93 Difference]: Finished difference Result 700 states and 2043 transitions. [2022-02-11 00:36:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:36:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:45,516 INFO L225 Difference]: With dead ends: 700 [2022-02-11 00:36:45,516 INFO L226 Difference]: Without dead ends: 633 [2022-02-11 00:36:45,517 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:36:45,517 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:45,517 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 213 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 577 Invalid, 0 Unknown, 313 Unchecked, 0.2s Time] [2022-02-11 00:36:45,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-11 00:36:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 396. [2022-02-11 00:36:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.017721518987342) internal successors, (1192), 395 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1192 transitions. [2022-02-11 00:36:45,522 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1192 transitions. Word has length 22 [2022-02-11 00:36:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:45,522 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1192 transitions. [2022-02-11 00:36:45,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1192 transitions. [2022-02-11 00:36:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:45,522 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:45,523 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:45,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:45,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-02-11 00:36:45,739 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1425035881, now seen corresponding path program 207 times [2022-02-11 00:36:45,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:45,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226181104] [2022-02-11 00:36:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:45,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:45,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:45,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226181104] [2022-02-11 00:36:45,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226181104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:45,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038699130] [2022-02-11 00:36:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:36:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:45,812 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:45,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-11 00:36:46,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:36:46,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:46,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:46,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:46,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:46,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:46,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-02-11 00:36:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:46,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:46,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:46,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:46,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:46,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:46,324 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:46,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:46,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038699130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:46,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:46,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:36:46,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61877827] [2022-02-11 00:36:46,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:46,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:36:46,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:36:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:36:46,332 INFO L87 Difference]: Start difference. First operand 396 states and 1192 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:46,576 INFO L93 Difference]: Finished difference Result 643 states and 1846 transitions. [2022-02-11 00:36:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:36:46,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:46,577 INFO L225 Difference]: With dead ends: 643 [2022-02-11 00:36:46,577 INFO L226 Difference]: Without dead ends: 610 [2022-02-11 00:36:46,577 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:36:46,577 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:46,577 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 216 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 812 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-02-11 00:36:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-11 00:36:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 387. [2022-02-11 00:36:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.010362694300518) internal successors, (1162), 386 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1162 transitions. [2022-02-11 00:36:46,602 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1162 transitions. Word has length 22 [2022-02-11 00:36:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:46,603 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1162 transitions. [2022-02-11 00:36:46,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1162 transitions. [2022-02-11 00:36:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:46,603 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:46,603 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:46,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:46,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-02-11 00:36:46,819 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:46,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:46,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1601709517, now seen corresponding path program 208 times [2022-02-11 00:36:46,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:46,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994869908] [2022-02-11 00:36:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:46,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:46,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:46,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994869908] [2022-02-11 00:36:46,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994869908] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:46,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113567902] [2022-02-11 00:36:46,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:46,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:46,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:46,909 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:46,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-11 00:36:47,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:47,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:47,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:47,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:47,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:47,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:47,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:47,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:47,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:47,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:47,570 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:47,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:47,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113567902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:47,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:47,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:36:47,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131526764] [2022-02-11 00:36:47,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:47,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:47,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:47,581 INFO L87 Difference]: Start difference. First operand 387 states and 1162 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:47,926 INFO L93 Difference]: Finished difference Result 611 states and 1772 transitions. [2022-02-11 00:36:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:36:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:47,927 INFO L225 Difference]: With dead ends: 611 [2022-02-11 00:36:47,927 INFO L226 Difference]: Without dead ends: 611 [2022-02-11 00:36:47,928 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:36:47,928 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:47,928 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 178 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:36:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-11 00:36:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 371. [2022-02-11 00:36:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0108108108108107) internal successors, (1114), 370 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1114 transitions. [2022-02-11 00:36:47,932 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1114 transitions. Word has length 22 [2022-02-11 00:36:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:47,932 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1114 transitions. [2022-02-11 00:36:47,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1114 transitions. [2022-02-11 00:36:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:47,933 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:47,933 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:47,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:48,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:48,147 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2012970719, now seen corresponding path program 209 times [2022-02-11 00:36:48,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:48,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335168652] [2022-02-11 00:36:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:48,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:48,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335168652] [2022-02-11 00:36:48,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335168652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:48,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707689974] [2022-02-11 00:36:48,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:48,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:48,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:48,396 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:48,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-11 00:36:48,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:48,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:48,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:48,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:48,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-11 00:36:48,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:48,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:36:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:49,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:49,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:49,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:49,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:49,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:49,333 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:49,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:49,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707689974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:49,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:49,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-02-11 00:36:49,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472962998] [2022-02-11 00:36:49,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:49,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:36:49,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:49,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:36:49,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:36:49,341 INFO L87 Difference]: Start difference. First operand 371 states and 1114 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:51,006 INFO L93 Difference]: Finished difference Result 1013 states and 2850 transitions. [2022-02-11 00:36:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:36:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:51,008 INFO L225 Difference]: With dead ends: 1013 [2022-02-11 00:36:51,008 INFO L226 Difference]: Without dead ends: 995 [2022-02-11 00:36:51,008 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=556, Invalid=2636, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:36:51,008 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 220 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:51,009 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 494 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1197 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-02-11 00:36:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-02-11 00:36:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 374. [2022-02-11 00:36:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.013404825737265) internal successors, (1124), 373 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1124 transitions. [2022-02-11 00:36:51,014 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1124 transitions. Word has length 22 [2022-02-11 00:36:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:51,014 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1124 transitions. [2022-02-11 00:36:51,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1124 transitions. [2022-02-11 00:36:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:51,016 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:51,016 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:51,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-11 00:36:51,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-02-11 00:36:51,216 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1939747083, now seen corresponding path program 210 times [2022-02-11 00:36:51,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:51,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566551752] [2022-02-11 00:36:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:51,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:51,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566551752] [2022-02-11 00:36:51,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566551752] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:51,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363717255] [2022-02-11 00:36:51,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:36:51,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:51,426 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:51,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-11 00:36:51,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:36:51,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:51,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:51,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:52,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:52,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:36:52,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:52,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:36:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:52,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:52,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:52,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:36:52,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:52,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:52,379 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:52,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:52,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363717255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:52,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:52,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-02-11 00:36:52,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847462184] [2022-02-11 00:36:52,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:52,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:36:52,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:36:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:36:52,389 INFO L87 Difference]: Start difference. First operand 374 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:52,770 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2022-02-11 00:36:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:52,771 INFO L225 Difference]: With dead ends: 517 [2022-02-11 00:36:52,771 INFO L226 Difference]: Without dead ends: 507 [2022-02-11 00:36:52,771 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:36:52,771 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:52,771 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 204 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 590 Invalid, 0 Unknown, 214 Unchecked, 0.2s Time] [2022-02-11 00:36:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-11 00:36:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 390. [2022-02-11 00:36:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9974293059125965) internal successors, (1166), 389 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1166 transitions. [2022-02-11 00:36:52,776 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1166 transitions. Word has length 22 [2022-02-11 00:36:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:52,776 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1166 transitions. [2022-02-11 00:36:52,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1166 transitions. [2022-02-11 00:36:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:52,776 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:52,776 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:52,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-11 00:36:52,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:52,993 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash 774448297, now seen corresponding path program 211 times [2022-02-11 00:36:52,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:52,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974374637] [2022-02-11 00:36:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:53,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:53,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974374637] [2022-02-11 00:36:53,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974374637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:53,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932457206] [2022-02-11 00:36:53,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:36:53,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:53,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:53,120 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:53,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-11 00:36:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:53,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:53,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:53,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:53,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-11 00:36:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:53,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:36:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:53,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:53,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:53,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:53,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:53,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:53,876 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:53,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:53,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932457206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:53,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:53,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-02-11 00:36:53,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220749784] [2022-02-11 00:36:53,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:53,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:36:53,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:53,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:36:53,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:36:53,885 INFO L87 Difference]: Start difference. First operand 390 states and 1166 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:55,032 INFO L93 Difference]: Finished difference Result 810 states and 2278 transitions. [2022-02-11 00:36:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:36:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:55,034 INFO L225 Difference]: With dead ends: 810 [2022-02-11 00:36:55,034 INFO L226 Difference]: Without dead ends: 736 [2022-02-11 00:36:55,034 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:36:55,034 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 194 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:55,035 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 371 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 902 Invalid, 0 Unknown, 273 Unchecked, 0.4s Time] [2022-02-11 00:36:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-02-11 00:36:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 400. [2022-02-11 00:36:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.025062656641604) internal successors, (1207), 399 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1207 transitions. [2022-02-11 00:36:55,040 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1207 transitions. Word has length 22 [2022-02-11 00:36:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:55,040 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1207 transitions. [2022-02-11 00:36:55,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1207 transitions. [2022-02-11 00:36:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:55,041 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:55,041 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:55,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-02-11 00:36:55,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:55,241 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:55,241 INFO L85 PathProgramCache]: Analyzing trace with hash 952192629, now seen corresponding path program 212 times [2022-02-11 00:36:55,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:55,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733580984] [2022-02-11 00:36:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:55,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:55,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733580984] [2022-02-11 00:36:55,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733580984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:55,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752900628] [2022-02-11 00:36:55,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:36:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:55,350 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:55,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-11 00:36:55,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:55,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:55,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:55,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:36:55,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:55,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-02-11 00:36:55,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:55,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 00:36:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:55,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:55,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:55,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:56,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:56,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:56,081 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:56,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:56,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752900628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:56,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:56,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-11 00:36:56,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7509477] [2022-02-11 00:36:56,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:56,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:36:56,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:36:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:36:56,087 INFO L87 Difference]: Start difference. First operand 400 states and 1207 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:56,359 INFO L93 Difference]: Finished difference Result 479 states and 1428 transitions. [2022-02-11 00:36:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:36:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:56,360 INFO L225 Difference]: With dead ends: 479 [2022-02-11 00:36:56,360 INFO L226 Difference]: Without dead ends: 470 [2022-02-11 00:36:56,360 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:36:56,360 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:56,360 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 173 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 261 Unchecked, 0.1s Time] [2022-02-11 00:36:56,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-02-11 00:36:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 399. [2022-02-11 00:36:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0251256281407035) internal successors, (1204), 398 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1204 transitions. [2022-02-11 00:36:56,365 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1204 transitions. Word has length 22 [2022-02-11 00:36:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:56,365 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1204 transitions. [2022-02-11 00:36:56,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1204 transitions. [2022-02-11 00:36:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:56,365 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:56,365 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:56,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:56,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2022-02-11 00:36:56,580 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:56,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1968961355, now seen corresponding path program 213 times [2022-02-11 00:36:56,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:56,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739780106] [2022-02-11 00:36:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:56,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:36:56,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:56,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739780106] [2022-02-11 00:36:56,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739780106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:56,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707701263] [2022-02-11 00:36:56,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:36:56,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:56,651 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:56,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-11 00:36:56,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:36:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:56,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-11 00:36:57,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:57,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-02-11 00:36:57,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-02-11 00:36:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:57,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:57,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:57,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:36:57,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:57,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:57,392 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:57,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:57,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707701263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:57,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:57,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-02-11 00:36:57,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94650947] [2022-02-11 00:36:57,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:57,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:36:57,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:36:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:36:57,400 INFO L87 Difference]: Start difference. First operand 399 states and 1204 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:57,739 INFO L93 Difference]: Finished difference Result 704 states and 2032 transitions. [2022-02-11 00:36:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:36:57,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:57,741 INFO L225 Difference]: With dead ends: 704 [2022-02-11 00:36:57,741 INFO L226 Difference]: Without dead ends: 565 [2022-02-11 00:36:57,741 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:36:57,741 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 155 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:57,741 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 199 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 761 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-02-11 00:36:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-11 00:36:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 370. [2022-02-11 00:36:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.978319783197832) internal successors, (1099), 369 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1099 transitions. [2022-02-11 00:36:57,745 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1099 transitions. Word has length 22 [2022-02-11 00:36:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:57,745 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1099 transitions. [2022-02-11 00:36:57,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1099 transitions. [2022-02-11 00:36:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:57,746 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:57,746 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:57,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:57,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:57,963 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash -391539511, now seen corresponding path program 214 times [2022-02-11 00:36:57,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:57,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295741378] [2022-02-11 00:36:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:57,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:58,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:58,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295741378] [2022-02-11 00:36:58,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295741378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:58,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761414220] [2022-02-11 00:36:58,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:36:58,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:58,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:58,054 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:58,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-11 00:36:58,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:36:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:58,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:58,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-02-11 00:36:58,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:58,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:58,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:58,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:58,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:58,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:58,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-11 00:36:58,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:58,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:36:58,702 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:36:58,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:36:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:58,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761414220] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:36:58,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:36:58,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2022-02-11 00:36:58,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293279039] [2022-02-11 00:36:58,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:36:58,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:36:58,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:36:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:36:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:36:58,711 INFO L87 Difference]: Start difference. First operand 370 states and 1099 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:36:59,174 INFO L93 Difference]: Finished difference Result 748 states and 2195 transitions. [2022-02-11 00:36:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:36:59,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:36:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:36:59,175 INFO L225 Difference]: With dead ends: 748 [2022-02-11 00:36:59,175 INFO L226 Difference]: Without dead ends: 619 [2022-02-11 00:36:59,175 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:36:59,176 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:36:59,176 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 269 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 617 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-02-11 00:36:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-11 00:36:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 372. [2022-02-11 00:36:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9784366576819408) internal successors, (1105), 371 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1105 transitions. [2022-02-11 00:36:59,180 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1105 transitions. Word has length 22 [2022-02-11 00:36:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:36:59,180 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1105 transitions. [2022-02-11 00:36:59,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:36:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1105 transitions. [2022-02-11 00:36:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 00:36:59,181 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:36:59,181 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:36:59,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-02-11 00:36:59,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:59,382 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:36:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:36:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash -946201253, now seen corresponding path program 215 times [2022-02-11 00:36:59,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:36:59,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010618547] [2022-02-11 00:36:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:36:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:36:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:36:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:59,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:36:59,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010618547] [2022-02-11 00:36:59,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010618547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:36:59,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161344617] [2022-02-11 00:36:59,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:36:59,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:36:59,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:36:59,485 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:36:59,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-11 00:36:59,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:36:59,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:36:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 00:36:59,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:36:59,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:59,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-02-11 00:36:59,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:36:59,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-02-11 00:36:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:36:59,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:36:59,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:59,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-11 00:36:59,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:36:59,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-02-11 00:37:00,004 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-11 00:37:00,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-02-11 00:37:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:37:00,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161344617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:00,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:00,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-11 00:37:00,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125150328] [2022-02-11 00:37:00,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:00,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:37:00,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:37:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:37:00,009 INFO L87 Difference]: Start difference. First operand 372 states and 1105 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:00,483 INFO L93 Difference]: Finished difference Result 599 states and 1743 transitions. [2022-02-11 00:37:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:37:00,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-11 00:37:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:00,484 INFO L225 Difference]: With dead ends: 599 [2022-02-11 00:37:00,484 INFO L226 Difference]: Without dead ends: 478 [2022-02-11 00:37:00,484 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:37:00,484 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:00,485 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 292 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:37:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-02-11 00:37:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2022-02-11 00:37:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-02-11 00:37:00,488 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-02-11 00:37:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:00,488 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-02-11 00:37:00,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-02-11 00:37:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:00,489 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:00,489 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:00,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:00,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-11 00:37:00,706 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2020815505, now seen corresponding path program 216 times [2022-02-11 00:37:00,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:00,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929587055] [2022-02-11 00:37:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:00,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:00,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929587055] [2022-02-11 00:37:00,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929587055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:00,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698622612] [2022-02-11 00:37:00,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:37:00,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:00,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:00,911 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:00,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-11 00:37:01,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:37:01,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:01,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:01,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-02-11 00:37:01,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:37:01,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:01,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:37:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:01,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:37:02,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:02,306 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:02,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-02-11 00:37:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:02,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698622612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:02,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:02,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-02-11 00:37:02,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994012695] [2022-02-11 00:37:02,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:02,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:37:02,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:37:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:37:02,412 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:03,364 INFO L93 Difference]: Finished difference Result 592 states and 1853 transitions. [2022-02-11 00:37:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:37:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:03,365 INFO L225 Difference]: With dead ends: 592 [2022-02-11 00:37:03,365 INFO L226 Difference]: Without dead ends: 553 [2022-02-11 00:37:03,366 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:37:03,366 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 176 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:03,366 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 329 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 780 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-02-11 00:37:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-11 00:37:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 335. [2022-02-11 00:37:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.05688622754491) internal successors, (1021), 334 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1021 transitions. [2022-02-11 00:37:03,370 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1021 transitions. Word has length 23 [2022-02-11 00:37:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:03,370 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1021 transitions. [2022-02-11 00:37:03,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1021 transitions. [2022-02-11 00:37:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:03,370 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:03,371 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:03,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:03,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-02-11 00:37:03,583 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:03,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:03,583 INFO L85 PathProgramCache]: Analyzing trace with hash -239067473, now seen corresponding path program 217 times [2022-02-11 00:37:03,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:03,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062262114] [2022-02-11 00:37:03,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:03,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:03,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:03,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062262114] [2022-02-11 00:37:03,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062262114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:03,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087952553] [2022-02-11 00:37:03,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:37:03,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:03,710 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:03,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-11 00:37:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:03,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:04,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:37:04,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:37:04,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:04,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-02-11 00:37:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:04,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:04,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:05,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-02-11 00:37:05,205 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:05,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-02-11 00:37:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:05,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087952553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:05,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:05,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:37:05,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516676534] [2022-02-11 00:37:05,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:05,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:37:05,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:37:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:37:05,303 INFO L87 Difference]: Start difference. First operand 335 states and 1021 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:05,896 INFO L93 Difference]: Finished difference Result 675 states and 2100 transitions. [2022-02-11 00:37:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:37:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:05,897 INFO L225 Difference]: With dead ends: 675 [2022-02-11 00:37:05,897 INFO L226 Difference]: Without dead ends: 628 [2022-02-11 00:37:05,897 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:37:05,897 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 313 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:05,897 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 246 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 685 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-02-11 00:37:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-02-11 00:37:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 370. [2022-02-11 00:37:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.151761517615176) internal successors, (1163), 369 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1163 transitions. [2022-02-11 00:37:05,902 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1163 transitions. Word has length 23 [2022-02-11 00:37:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:05,902 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1163 transitions. [2022-02-11 00:37:05,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1163 transitions. [2022-02-11 00:37:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:05,903 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:05,903 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:05,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-11 00:37:06,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-02-11 00:37:06,120 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1703477295, now seen corresponding path program 218 times [2022-02-11 00:37:06,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:06,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348343096] [2022-02-11 00:37:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:06,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:06,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:06,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348343096] [2022-02-11 00:37:06,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348343096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:06,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268264644] [2022-02-11 00:37:06,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:37:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:06,235 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:06,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-11 00:37:06,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:37:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:06,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:06,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2022-02-11 00:37:06,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:37:06,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:06,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:37:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:07,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:07,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-02-11 00:37:07,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:07,456 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:07,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-02-11 00:37:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:07,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268264644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:07,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:07,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:37:07,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050160216] [2022-02-11 00:37:07,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:07,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:37:07,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:37:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:37:07,536 INFO L87 Difference]: Start difference. First operand 370 states and 1163 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:08,723 INFO L93 Difference]: Finished difference Result 913 states and 2825 transitions. [2022-02-11 00:37:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:37:08,723 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:08,725 INFO L225 Difference]: With dead ends: 913 [2022-02-11 00:37:08,725 INFO L226 Difference]: Without dead ends: 785 [2022-02-11 00:37:08,725 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:37:08,725 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 190 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 937 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:08,725 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 626 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1547 Invalid, 0 Unknown, 937 Unchecked, 0.4s Time] [2022-02-11 00:37:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-02-11 00:37:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 417. [2022-02-11 00:37:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.2764423076923075) internal successors, (1363), 416 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1363 transitions. [2022-02-11 00:37:08,732 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1363 transitions. Word has length 23 [2022-02-11 00:37:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:08,732 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1363 transitions. [2022-02-11 00:37:08,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1363 transitions. [2022-02-11 00:37:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:08,733 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:08,733 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:08,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:08,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:08,935 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash -574340681, now seen corresponding path program 219 times [2022-02-11 00:37:08,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:08,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200590446] [2022-02-11 00:37:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:09,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:09,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200590446] [2022-02-11 00:37:09,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200590446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:09,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452036928] [2022-02-11 00:37:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:37:09,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:09,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:09,045 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:09,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-11 00:37:09,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:37:09,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:09,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2022-02-11 00:37:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:09,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-11 00:37:09,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 165 [2022-02-11 00:37:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:09,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:09,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:37:10,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:10,283 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:10,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-02-11 00:37:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:10,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452036928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:10,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:10,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:37:10,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274538237] [2022-02-11 00:37:10,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:10,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:37:10,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:37:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:37:10,334 INFO L87 Difference]: Start difference. First operand 417 states and 1363 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:12,002 INFO L93 Difference]: Finished difference Result 873 states and 2755 transitions. [2022-02-11 00:37:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:37:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:12,004 INFO L225 Difference]: With dead ends: 873 [2022-02-11 00:37:12,004 INFO L226 Difference]: Without dead ends: 775 [2022-02-11 00:37:12,005 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=591, Invalid=5109, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:37:12,005 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 168 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:12,005 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 587 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1477 Invalid, 0 Unknown, 682 Unchecked, 0.4s Time] [2022-02-11 00:37:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-11 00:37:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 415. [2022-02-11 00:37:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.285024154589372) internal successors, (1360), 414 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1360 transitions. [2022-02-11 00:37:12,010 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1360 transitions. Word has length 23 [2022-02-11 00:37:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:12,010 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1360 transitions. [2022-02-11 00:37:12,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1360 transitions. [2022-02-11 00:37:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:12,011 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:12,011 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:12,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:12,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-02-11 00:37:12,228 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash 722270827, now seen corresponding path program 220 times [2022-02-11 00:37:12,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:12,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973679433] [2022-02-11 00:37:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:12,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:12,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973679433] [2022-02-11 00:37:12,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973679433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:12,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522660207] [2022-02-11 00:37:12,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:37:12,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:12,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:12,314 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:12,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-11 00:37:12,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:37:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:12,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 152 [2022-02-11 00:37:12,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:37:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:12,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:37:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:13,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:13,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:37:13,558 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:13,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 286 [2022-02-11 00:37:13,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 232 [2022-02-11 00:37:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:13,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522660207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:13,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:13,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:37:13,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031392110] [2022-02-11 00:37:13,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:13,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:37:13,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:37:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:37:13,683 INFO L87 Difference]: Start difference. First operand 415 states and 1360 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:15,102 INFO L93 Difference]: Finished difference Result 912 states and 2965 transitions. [2022-02-11 00:37:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:37:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:15,104 INFO L225 Difference]: With dead ends: 912 [2022-02-11 00:37:15,104 INFO L226 Difference]: Without dead ends: 835 [2022-02-11 00:37:15,104 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=458, Invalid=3574, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:37:15,104 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 175 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:15,104 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 671 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1133 Invalid, 0 Unknown, 561 Unchecked, 0.4s Time] [2022-02-11 00:37:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-11 00:37:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 432. [2022-02-11 00:37:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.3387470997679816) internal successors, (1439), 431 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1439 transitions. [2022-02-11 00:37:15,110 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1439 transitions. Word has length 23 [2022-02-11 00:37:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:15,111 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1439 transitions. [2022-02-11 00:37:15,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1439 transitions. [2022-02-11 00:37:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:15,111 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:15,111 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:15,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-11 00:37:15,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:15,316 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1011545183, now seen corresponding path program 221 times [2022-02-11 00:37:15,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:15,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251050750] [2022-02-11 00:37:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:15,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:15,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251050750] [2022-02-11 00:37:15,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251050750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:15,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376638120] [2022-02-11 00:37:15,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:37:15,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:15,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:15,418 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:15,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-11 00:37:15,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:37:15,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:37:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:15,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-02-11 00:37:16,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:37:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:16,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2022-02-11 00:37:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:16,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:16,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 276 [2022-02-11 00:37:17,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-02-11 00:37:17,403 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:17,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-02-11 00:37:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:17,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376638120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:17,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:17,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:37:17,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337279020] [2022-02-11 00:37:17,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:17,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:37:17,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:37:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:37:17,542 INFO L87 Difference]: Start difference. First operand 432 states and 1439 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:18,584 INFO L93 Difference]: Finished difference Result 1224 states and 3958 transitions. [2022-02-11 00:37:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:37:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:18,586 INFO L225 Difference]: With dead ends: 1224 [2022-02-11 00:37:18,586 INFO L226 Difference]: Without dead ends: 1072 [2022-02-11 00:37:18,586 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:37:18,586 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 388 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:18,586 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 395 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1042 Invalid, 0 Unknown, 361 Unchecked, 0.4s Time] [2022-02-11 00:37:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-02-11 00:37:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 490. [2022-02-11 00:37:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.539877300613497) internal successors, (1731), 489 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1731 transitions. [2022-02-11 00:37:18,594 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1731 transitions. Word has length 23 [2022-02-11 00:37:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:18,594 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1731 transitions. [2022-02-11 00:37:18,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1731 transitions. [2022-02-11 00:37:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:18,594 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:18,595 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:18,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:18,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-02-11 00:37:18,795 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1523369173, now seen corresponding path program 222 times [2022-02-11 00:37:18,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:18,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032389855] [2022-02-11 00:37:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:18,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:18,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032389855] [2022-02-11 00:37:18,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032389855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:18,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350739660] [2022-02-11 00:37:18,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:37:18,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:18,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:18,928 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:18,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-11 00:37:19,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:37:19,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:19,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:19,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-02-11 00:37:19,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:37:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:19,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:37:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:20,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:20,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:20,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-02-11 00:37:20,575 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:20,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2022-02-11 00:37:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:20,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350739660] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:20,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:20,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:37:20,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631535111] [2022-02-11 00:37:20,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:20,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:37:20,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:37:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:37:20,721 INFO L87 Difference]: Start difference. First operand 490 states and 1731 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:21,396 INFO L93 Difference]: Finished difference Result 792 states and 2642 transitions. [2022-02-11 00:37:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:37:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:21,398 INFO L225 Difference]: With dead ends: 792 [2022-02-11 00:37:21,398 INFO L226 Difference]: Without dead ends: 745 [2022-02-11 00:37:21,398 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:37:21,398 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:21,398 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 321 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 701 Invalid, 0 Unknown, 303 Unchecked, 0.3s Time] [2022-02-11 00:37:21,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-11 00:37:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 511. [2022-02-11 00:37:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.5313725490196077) internal successors, (1801), 510 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1801 transitions. [2022-02-11 00:37:21,404 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1801 transitions. Word has length 23 [2022-02-11 00:37:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:21,404 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1801 transitions. [2022-02-11 00:37:21,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1801 transitions. [2022-02-11 00:37:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:21,405 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:21,405 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:21,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:21,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:21,615 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash -57402743, now seen corresponding path program 223 times [2022-02-11 00:37:21,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:21,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357318441] [2022-02-11 00:37:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:21,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:21,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357318441] [2022-02-11 00:37:21,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357318441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:21,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012315629] [2022-02-11 00:37:21,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:37:21,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:21,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:21,792 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:21,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-11 00:37:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:22,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:37:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:22,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 189 [2022-02-11 00:37:22,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2022-02-11 00:37:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:37:22,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:23,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-02-11 00:37:23,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-02-11 00:37:23,381 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:23,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 183 [2022-02-11 00:37:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:37:23,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012315629] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:23,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:23,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:37:23,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739940503] [2022-02-11 00:37:23,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:23,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:37:23,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:23,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:37:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:37:23,528 INFO L87 Difference]: Start difference. First operand 511 states and 1801 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:24,692 INFO L93 Difference]: Finished difference Result 1082 states and 3617 transitions. [2022-02-11 00:37:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:37:24,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:24,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:24,694 INFO L225 Difference]: With dead ends: 1082 [2022-02-11 00:37:24,694 INFO L226 Difference]: Without dead ends: 952 [2022-02-11 00:37:24,694 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:37:24,695 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 201 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:24,695 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 600 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1603 Invalid, 0 Unknown, 179 Unchecked, 0.4s Time] [2022-02-11 00:37:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-11 00:37:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 570. [2022-02-11 00:37:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.6045694200351495) internal successors, (2051), 569 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 2051 transitions. [2022-02-11 00:37:24,702 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 2051 transitions. Word has length 23 [2022-02-11 00:37:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:24,702 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 2051 transitions. [2022-02-11 00:37:24,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 2051 transitions. [2022-02-11 00:37:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:24,703 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:24,703 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:24,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:24,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:24,920 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:24,920 INFO L85 PathProgramCache]: Analyzing trace with hash -192457175, now seen corresponding path program 224 times [2022-02-11 00:37:24,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:24,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417012379] [2022-02-11 00:37:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:24,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:25,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:25,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417012379] [2022-02-11 00:37:25,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417012379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:25,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470689686] [2022-02-11 00:37:25,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:37:25,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:25,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:25,037 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:25,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-11 00:37:25,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:37:25,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:37:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:25,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 237 [2022-02-11 00:37:25,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:37:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:25,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:37:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:25,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:26,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 373 treesize of output 333 [2022-02-11 00:37:26,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 272 [2022-02-11 00:37:26,756 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:26,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 240 [2022-02-11 00:37:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:26,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470689686] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:26,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:26,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:37:26,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273610378] [2022-02-11 00:37:26,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:26,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:37:26,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:26,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:37:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:37:26,882 INFO L87 Difference]: Start difference. First operand 570 states and 2051 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:28,778 INFO L93 Difference]: Finished difference Result 1528 states and 4828 transitions. [2022-02-11 00:37:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:37:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:28,780 INFO L225 Difference]: With dead ends: 1528 [2022-02-11 00:37:28,781 INFO L226 Difference]: Without dead ends: 1133 [2022-02-11 00:37:28,781 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=568, Invalid=6074, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 00:37:28,781 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 289 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:28,781 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 862 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2035 Invalid, 0 Unknown, 366 Unchecked, 0.6s Time] [2022-02-11 00:37:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-02-11 00:37:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 648. [2022-02-11 00:37:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-02-11 00:37:28,790 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-02-11 00:37:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:28,790 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-02-11 00:37:28,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-02-11 00:37:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:28,791 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:28,791 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:28,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:29,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:29,007 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1898578769, now seen corresponding path program 225 times [2022-02-11 00:37:29,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:29,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207093312] [2022-02-11 00:37:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:29,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:29,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:29,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207093312] [2022-02-11 00:37:29,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207093312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:29,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571010403] [2022-02-11 00:37:29,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:37:29,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:29,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:29,084 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-11 00:37:29,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:37:29,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:29,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-02-11 00:37:29,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:29,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-02-11 00:37:29,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-02-11 00:37:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:29,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:30,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-02-11 00:37:30,254 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:30,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-02-11 00:37:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:30,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571010403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:30,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:30,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:37:30,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708047117] [2022-02-11 00:37:30,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:30,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:37:30,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:30,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:37:30,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:37:30,375 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:30,656 INFO L93 Difference]: Finished difference Result 829 states and 2815 transitions. [2022-02-11 00:37:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:37:30,656 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:30,657 INFO L225 Difference]: With dead ends: 829 [2022-02-11 00:37:30,657 INFO L226 Difference]: Without dead ends: 793 [2022-02-11 00:37:30,657 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:37:30,657 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:30,657 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 264 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 688 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-02-11 00:37:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-02-11 00:37:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 648. [2022-02-11 00:37:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-02-11 00:37:30,665 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-02-11 00:37:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:30,665 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-02-11 00:37:30,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-02-11 00:37:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:30,666 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:30,666 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:30,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:30,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-02-11 00:37:30,882 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 637099387, now seen corresponding path program 226 times [2022-02-11 00:37:30,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:30,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423043348] [2022-02-11 00:37:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:30,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:30,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423043348] [2022-02-11 00:37:30,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423043348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:30,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045967841] [2022-02-11 00:37:30,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:37:30,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:30,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:31,000 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:31,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-11 00:37:31,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:37:31,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:31,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:37:31,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:31,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 244 [2022-02-11 00:37:31,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 192 [2022-02-11 00:37:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:32,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:32,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:32,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 239 [2022-02-11 00:37:32,438 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:32,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 211 [2022-02-11 00:37:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:32,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045967841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:32,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:32,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:37:32,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9797993] [2022-02-11 00:37:32,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:32,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:37:32,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:37:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:37:32,597 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:33,008 INFO L93 Difference]: Finished difference Result 838 states and 2843 transitions. [2022-02-11 00:37:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:37:33,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:33,009 INFO L225 Difference]: With dead ends: 838 [2022-02-11 00:37:33,009 INFO L226 Difference]: Without dead ends: 809 [2022-02-11 00:37:33,009 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:37:33,009 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 169 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:33,010 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 272 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 683 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-02-11 00:37:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-11 00:37:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 648. [2022-02-11 00:37:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-02-11 00:37:33,017 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-02-11 00:37:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:33,017 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-02-11 00:37:33,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-02-11 00:37:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:33,018 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:33,018 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:33,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:33,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-02-11 00:37:33,218 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 882528537, now seen corresponding path program 227 times [2022-02-11 00:37:33,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:33,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586553391] [2022-02-11 00:37:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:33,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:33,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:33,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586553391] [2022-02-11 00:37:33,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586553391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:33,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796843729] [2022-02-11 00:37:33,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:37:33,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:33,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:33,353 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:33,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-11 00:37:33,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:37:33,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:33,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-02-11 00:37:34,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:37:34,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:34,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:37:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:34,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:34,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:34,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 245 [2022-02-11 00:37:34,618 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:34,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 215 [2022-02-11 00:37:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:34,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796843729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:34,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:34,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:37:34,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111433487] [2022-02-11 00:37:34,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:34,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:37:34,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:37:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:37:34,746 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:35,568 INFO L93 Difference]: Finished difference Result 1325 states and 4137 transitions. [2022-02-11 00:37:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:37:35,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:35,570 INFO L225 Difference]: With dead ends: 1325 [2022-02-11 00:37:35,570 INFO L226 Difference]: Without dead ends: 1184 [2022-02-11 00:37:35,570 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:37:35,570 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 220 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:35,570 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 527 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1150 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-02-11 00:37:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-02-11 00:37:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 702. [2022-02-11 00:37:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.470756062767475) internal successors, (2433), 701 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2433 transitions. [2022-02-11 00:37:35,580 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2433 transitions. Word has length 23 [2022-02-11 00:37:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:35,580 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2433 transitions. [2022-02-11 00:37:35,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2433 transitions. [2022-02-11 00:37:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:35,581 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:35,581 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:35,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:35,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-11 00:37:35,798 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1725232039, now seen corresponding path program 228 times [2022-02-11 00:37:35,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:35,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099330641] [2022-02-11 00:37:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:37:35,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:35,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099330641] [2022-02-11 00:37:35,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099330641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:35,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065888668] [2022-02-11 00:37:35,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:37:35,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:35,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:35,951 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:35,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-11 00:37:36,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:37:36,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:36,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:36,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-02-11 00:37:36,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:37:36,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:36,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2022-02-11 00:37:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:36,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:37,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:37:37,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:37:37,344 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:37,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-02-11 00:37:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:37,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065888668] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:37,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:37,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:37:37,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895529709] [2022-02-11 00:37:37,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:37,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:37:37,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:37:37,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:37:37,475 INFO L87 Difference]: Start difference. First operand 702 states and 2433 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:40,284 INFO L93 Difference]: Finished difference Result 1518 states and 4983 transitions. [2022-02-11 00:37:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 00:37:40,284 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:40,287 INFO L225 Difference]: With dead ends: 1518 [2022-02-11 00:37:40,287 INFO L226 Difference]: Without dead ends: 1411 [2022-02-11 00:37:40,287 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=873, Invalid=6959, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 00:37:40,287 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 246 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:40,287 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 689 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1953 Invalid, 0 Unknown, 522 Unchecked, 0.6s Time] [2022-02-11 00:37:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-02-11 00:37:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 699. [2022-02-11 00:37:40,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.4656160458452723) internal successors, (2419), 698 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2419 transitions. [2022-02-11 00:37:40,298 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2419 transitions. Word has length 23 [2022-02-11 00:37:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:40,298 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2419 transitions. [2022-02-11 00:37:40,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2419 transitions. [2022-02-11 00:37:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:40,299 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:40,299 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:40,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:40,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:40,513 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash -150983109, now seen corresponding path program 229 times [2022-02-11 00:37:40,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:40,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693833360] [2022-02-11 00:37:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:40,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:40,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:40,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693833360] [2022-02-11 00:37:40,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693833360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:40,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380920116] [2022-02-11 00:37:40,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:37:40,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:40,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:40,664 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:40,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-11 00:37:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:41,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 201 [2022-02-11 00:37:41,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-02-11 00:37:41,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:41,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-02-11 00:37:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:41,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:41,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 246 [2022-02-11 00:37:42,263 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:42,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:37:42,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:37:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:42,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380920116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:42,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:42,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:37:42,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004814035] [2022-02-11 00:37:42,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:42,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:37:42,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:37:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:37:42,366 INFO L87 Difference]: Start difference. First operand 699 states and 2419 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:43,178 INFO L93 Difference]: Finished difference Result 1114 states and 3636 transitions. [2022-02-11 00:37:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:37:43,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:43,180 INFO L225 Difference]: With dead ends: 1114 [2022-02-11 00:37:43,180 INFO L226 Difference]: Without dead ends: 1016 [2022-02-11 00:37:43,180 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:37:43,180 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:43,180 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 601 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1267 Invalid, 0 Unknown, 541 Unchecked, 0.3s Time] [2022-02-11 00:37:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-02-11 00:37:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 705. [2022-02-11 00:37:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.4744318181818183) internal successors, (2446), 704 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2446 transitions. [2022-02-11 00:37:43,189 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2446 transitions. Word has length 23 [2022-02-11 00:37:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:43,189 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2446 transitions. [2022-02-11 00:37:43,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2446 transitions. [2022-02-11 00:37:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:43,190 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:43,190 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:43,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:43,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-02-11 00:37:43,403 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash -97398047, now seen corresponding path program 230 times [2022-02-11 00:37:43,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:43,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253623173] [2022-02-11 00:37:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:43,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:43,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253623173] [2022-02-11 00:37:43,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253623173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:43,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712775098] [2022-02-11 00:37:43,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:37:43,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:43,470 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:43,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-11 00:37:43,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:37:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:43,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-02-11 00:37:44,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:37:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:44,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:37:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:44,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:44,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:37:44,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-02-11 00:37:44,869 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:44,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-02-11 00:37:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:44,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712775098] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:44,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:44,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:37:44,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754403626] [2022-02-11 00:37:44,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:37:44,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:37:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:37:44,999 INFO L87 Difference]: Start difference. First operand 705 states and 2446 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:45,138 INFO L93 Difference]: Finished difference Result 890 states and 2974 transitions. [2022-02-11 00:37:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:37:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:45,140 INFO L225 Difference]: With dead ends: 890 [2022-02-11 00:37:45,140 INFO L226 Difference]: Without dead ends: 843 [2022-02-11 00:37:45,140 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:37:45,140 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:45,140 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 222 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 451 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2022-02-11 00:37:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-02-11 00:37:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 734. [2022-02-11 00:37:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.442019099590723) internal successors, (2523), 733 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2523 transitions. [2022-02-11 00:37:45,148 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2523 transitions. Word has length 23 [2022-02-11 00:37:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:45,148 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2523 transitions. [2022-02-11 00:37:45,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2523 transitions. [2022-02-11 00:37:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:45,149 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:45,149 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:45,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-02-11 00:37:45,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-02-11 00:37:45,363 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2125767515, now seen corresponding path program 231 times [2022-02-11 00:37:45,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:45,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626946748] [2022-02-11 00:37:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:45,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:45,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:45,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626946748] [2022-02-11 00:37:45,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626946748] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:45,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803916495] [2022-02-11 00:37:45,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:37:45,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:45,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:45,506 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:45,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-11 00:37:45,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:37:45,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:45,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:37:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:46,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-02-11 00:37:46,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-02-11 00:37:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:46,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:47,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:37:47,404 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:47,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:37:47,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:37:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:47,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803916495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:47,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:47,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:37:47,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273971928] [2022-02-11 00:37:47,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:47,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:37:47,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:37:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:37:47,506 INFO L87 Difference]: Start difference. First operand 734 states and 2523 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:48,116 INFO L93 Difference]: Finished difference Result 1070 states and 3557 transitions. [2022-02-11 00:37:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:37:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:48,118 INFO L225 Difference]: With dead ends: 1070 [2022-02-11 00:37:48,118 INFO L226 Difference]: Without dead ends: 995 [2022-02-11 00:37:48,118 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:37:48,118 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 161 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:48,118 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 431 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 761 Invalid, 0 Unknown, 323 Unchecked, 0.2s Time] [2022-02-11 00:37:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-02-11 00:37:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 727. [2022-02-11 00:37:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.43801652892562) internal successors, (2496), 726 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2496 transitions. [2022-02-11 00:37:48,126 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2496 transitions. Word has length 23 [2022-02-11 00:37:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:48,126 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 2496 transitions. [2022-02-11 00:37:48,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2496 transitions. [2022-02-11 00:37:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:48,127 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:48,127 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:48,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:48,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-02-11 00:37:48,345 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1890464561, now seen corresponding path program 232 times [2022-02-11 00:37:48,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:48,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30983910] [2022-02-11 00:37:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:37:48,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:48,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30983910] [2022-02-11 00:37:48,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30983910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:48,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116577029] [2022-02-11 00:37:48,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:37:48,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:48,463 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:48,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-11 00:37:48,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:37:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:37:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:48,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:37:49,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 189 [2022-02-11 00:37:49,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:49,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 184 [2022-02-11 00:37:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:49,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:49,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 285 [2022-02-11 00:37:50,308 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:50,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 273 [2022-02-11 00:37:50,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 236 [2022-02-11 00:37:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:50,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116577029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:50,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:50,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:37:50,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157381552] [2022-02-11 00:37:50,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:50,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:37:50,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:37:50,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:37:50,427 INFO L87 Difference]: Start difference. First operand 727 states and 2496 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:52,826 INFO L93 Difference]: Finished difference Result 1434 states and 4529 transitions. [2022-02-11 00:37:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:37:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:52,829 INFO L225 Difference]: With dead ends: 1434 [2022-02-11 00:37:52,829 INFO L226 Difference]: Without dead ends: 1281 [2022-02-11 00:37:52,830 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=576, Invalid=5904, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:37:52,830 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 209 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:52,830 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 945 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2275 Invalid, 0 Unknown, 363 Unchecked, 0.7s Time] [2022-02-11 00:37:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-02-11 00:37:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 776. [2022-02-11 00:37:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.5006451612903224) internal successors, (2713), 775 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2713 transitions. [2022-02-11 00:37:52,841 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2713 transitions. Word has length 23 [2022-02-11 00:37:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:52,841 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2713 transitions. [2022-02-11 00:37:52,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2713 transitions. [2022-02-11 00:37:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:52,842 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:52,842 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:52,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-02-11 00:37:53,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:53,055 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1393962373, now seen corresponding path program 233 times [2022-02-11 00:37:53,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:53,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660364771] [2022-02-11 00:37:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:53,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:53,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660364771] [2022-02-11 00:37:53,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660364771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:53,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19114064] [2022-02-11 00:37:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:37:53,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:53,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:53,195 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:53,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-11 00:37:53,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:37:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:53,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:37:54,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:54,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 239 [2022-02-11 00:37:54,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 181 [2022-02-11 00:37:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:54,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:54,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-02-11 00:37:54,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:37:54,932 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:54,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-02-11 00:37:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:55,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19114064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:55,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:55,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:37:55,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161945876] [2022-02-11 00:37:55,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:55,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:37:55,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:37:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:37:55,083 INFO L87 Difference]: Start difference. First operand 776 states and 2713 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:55,208 INFO L93 Difference]: Finished difference Result 988 states and 3328 transitions. [2022-02-11 00:37:55,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:37:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:55,209 INFO L225 Difference]: With dead ends: 988 [2022-02-11 00:37:55,209 INFO L226 Difference]: Without dead ends: 941 [2022-02-11 00:37:55,209 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:37:55,210 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:55,210 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 185 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-02-11 00:37:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-02-11 00:37:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 830. [2022-02-11 00:37:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4632086851628467) internal successors, (2871), 829 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2871 transitions. [2022-02-11 00:37:55,219 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2871 transitions. Word has length 23 [2022-02-11 00:37:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2871 transitions. [2022-02-11 00:37:55,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2871 transitions. [2022-02-11 00:37:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:55,220 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:55,220 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:55,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-02-11 00:37:55,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:55,435 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1089657063, now seen corresponding path program 234 times [2022-02-11 00:37:55,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:55,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120396940] [2022-02-11 00:37:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:55,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:37:55,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:55,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120396940] [2022-02-11 00:37:55,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120396940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:55,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411884549] [2022-02-11 00:37:55,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:37:55,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:55,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:55,571 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:55,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-11 00:37:55,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:37:55,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:37:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:55,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 211 [2022-02-11 00:37:56,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:37:56,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:56,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:37:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:56,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:56,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-02-11 00:37:57,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 281 [2022-02-11 00:37:57,355 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:37:57,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 249 [2022-02-11 00:37:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:37:57,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411884549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:37:57,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:37:57,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 00:37:57,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079615632] [2022-02-11 00:37:57,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:37:57,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:37:57,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:37:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:37:57,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:37:57,573 INFO L87 Difference]: Start difference. First operand 830 states and 2871 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:37:58,477 INFO L93 Difference]: Finished difference Result 1611 states and 5560 transitions. [2022-02-11 00:37:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:37:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:37:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:37:58,480 INFO L225 Difference]: With dead ends: 1611 [2022-02-11 00:37:58,480 INFO L226 Difference]: Without dead ends: 1493 [2022-02-11 00:37:58,480 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=2184, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:37:58,480 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 149 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:37:58,480 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 716 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1262 Invalid, 0 Unknown, 414 Unchecked, 0.4s Time] [2022-02-11 00:37:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-02-11 00:37:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 875. [2022-02-11 00:37:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4393592677345537) internal successors, (3006), 874 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3006 transitions. [2022-02-11 00:37:58,504 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3006 transitions. Word has length 23 [2022-02-11 00:37:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:37:58,505 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 3006 transitions. [2022-02-11 00:37:58,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:37:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3006 transitions. [2022-02-11 00:37:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:37:58,506 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:37:58,506 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:37:58,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-02-11 00:37:58,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:58,722 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:37:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:37:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash 830567363, now seen corresponding path program 235 times [2022-02-11 00:37:58,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:37:58,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065600925] [2022-02-11 00:37:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:37:58,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:37:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:58,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:37:58,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065600925] [2022-02-11 00:37:58,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065600925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:37:58,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964409136] [2022-02-11 00:37:58,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:37:58,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:37:58,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:37:58,816 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:37:58,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-11 00:37:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:37:59,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:37:59,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:37:59,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 213 [2022-02-11 00:37:59,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:37:59,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:37:59,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:37:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:37:59,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:37:59,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-02-11 00:38:00,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 285 [2022-02-11 00:38:00,402 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:00,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 253 [2022-02-11 00:38:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:00,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964409136] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:00,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:00,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:38:00,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507711972] [2022-02-11 00:38:00,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:00,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:38:00,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:38:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:38:00,595 INFO L87 Difference]: Start difference. First operand 875 states and 3006 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:00,710 INFO L93 Difference]: Finished difference Result 1083 states and 3619 transitions. [2022-02-11 00:38:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:38:00,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:00,712 INFO L225 Difference]: With dead ends: 1083 [2022-02-11 00:38:00,712 INFO L226 Difference]: Without dead ends: 1046 [2022-02-11 00:38:00,712 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:38:00,712 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:00,712 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 272 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-02-11 00:38:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-02-11 00:38:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 911. [2022-02-11 00:38:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.4285714285714284) internal successors, (3120), 910 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3120 transitions. [2022-02-11 00:38:00,722 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3120 transitions. Word has length 23 [2022-02-11 00:38:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:00,722 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 3120 transitions. [2022-02-11 00:38:00,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3120 transitions. [2022-02-11 00:38:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:00,724 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:00,724 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:00,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:00,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:00,939 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2114107551, now seen corresponding path program 236 times [2022-02-11 00:38:00,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:00,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196985547] [2022-02-11 00:38:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:00,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:01,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:01,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196985547] [2022-02-11 00:38:01,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196985547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:01,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192713374] [2022-02-11 00:38:01,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:01,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:01,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:01,121 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:01,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-11 00:38:01,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:01,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 268 [2022-02-11 00:38:02,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:38:02,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:02,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:38:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:02,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:02,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 276 [2022-02-11 00:38:02,905 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:02,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:38:02,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:38:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:03,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192713374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:03,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:03,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:03,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358541867] [2022-02-11 00:38:03,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:03,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:03,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:03,054 INFO L87 Difference]: Start difference. First operand 911 states and 3120 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:03,870 INFO L93 Difference]: Finished difference Result 1467 states and 4707 transitions. [2022-02-11 00:38:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:38:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:03,873 INFO L225 Difference]: With dead ends: 1467 [2022-02-11 00:38:03,873 INFO L226 Difference]: Without dead ends: 1425 [2022-02-11 00:38:03,874 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:38:03,874 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 158 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:03,874 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 774 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 975 Invalid, 0 Unknown, 391 Unchecked, 0.3s Time] [2022-02-11 00:38:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-02-11 00:38:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 965. [2022-02-11 00:38:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.412863070539419) internal successors, (3290), 964 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3290 transitions. [2022-02-11 00:38:03,897 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3290 transitions. Word has length 23 [2022-02-11 00:38:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:03,897 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 3290 transitions. [2022-02-11 00:38:03,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3290 transitions. [2022-02-11 00:38:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:03,903 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:03,903 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:03,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:04,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-02-11 00:38:04,122 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash 685809875, now seen corresponding path program 237 times [2022-02-11 00:38:04,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:04,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303810525] [2022-02-11 00:38:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:04,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:04,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:04,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303810525] [2022-02-11 00:38:04,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303810525] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:04,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048872907] [2022-02-11 00:38:04,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:04,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:04,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:04,212 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:04,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-11 00:38:04,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:38:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:04,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:38:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:05,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-02-11 00:38:05,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-02-11 00:38:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:05,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:05,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 217 [2022-02-11 00:38:05,726 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:05,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:38:05,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:38:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:05,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048872907] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:05,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:05,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:38:05,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457848559] [2022-02-11 00:38:05,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:05,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:38:05,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:38:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:38:05,850 INFO L87 Difference]: Start difference. First operand 965 states and 3290 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:05,962 INFO L93 Difference]: Finished difference Result 1177 states and 3903 transitions. [2022-02-11 00:38:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:05,965 INFO L225 Difference]: With dead ends: 1177 [2022-02-11 00:38:05,965 INFO L226 Difference]: Without dead ends: 1158 [2022-02-11 00:38:05,965 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:38:05,966 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:05,966 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 291 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 304 Invalid, 0 Unknown, 316 Unchecked, 0.1s Time] [2022-02-11 00:38:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-02-11 00:38:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 989. [2022-02-11 00:38:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 3.402834008097166) internal successors, (3362), 988 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 3362 transitions. [2022-02-11 00:38:05,977 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 3362 transitions. Word has length 23 [2022-02-11 00:38:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:05,977 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 3362 transitions. [2022-02-11 00:38:05,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 3362 transitions. [2022-02-11 00:38:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:05,979 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:05,979 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:05,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:06,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:06,196 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash 188566481, now seen corresponding path program 238 times [2022-02-11 00:38:06,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:06,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176602665] [2022-02-11 00:38:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:06,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:06,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:06,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176602665] [2022-02-11 00:38:06,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176602665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:06,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427883718] [2022-02-11 00:38:06,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:06,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:06,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:06,297 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:06,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-11 00:38:06,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:06,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:06,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 241 [2022-02-11 00:38:07,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:07,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 195 [2022-02-11 00:38:07,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 153 [2022-02-11 00:38:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:07,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:07,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-02-11 00:38:07,908 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:07,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 143 [2022-02-11 00:38:07,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 127 [2022-02-11 00:38:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:08,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427883718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:08,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:08,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:38:08,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506733194] [2022-02-11 00:38:08,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:08,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:38:08,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:38:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:38:08,086 INFO L87 Difference]: Start difference. First operand 989 states and 3362 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:08,246 INFO L93 Difference]: Finished difference Result 1359 states and 4440 transitions. [2022-02-11 00:38:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:38:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:08,249 INFO L225 Difference]: With dead ends: 1359 [2022-02-11 00:38:08,249 INFO L226 Difference]: Without dead ends: 1300 [2022-02-11 00:38:08,249 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:38:08,249 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:08,249 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 246 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 292 Unchecked, 0.1s Time] [2022-02-11 00:38:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-02-11 00:38:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1065. [2022-02-11 00:38:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.369360902255639) internal successors, (3585), 1064 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3585 transitions. [2022-02-11 00:38:08,262 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3585 transitions. Word has length 23 [2022-02-11 00:38:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:08,262 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 3585 transitions. [2022-02-11 00:38:08,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3585 transitions. [2022-02-11 00:38:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:08,263 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:08,263 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:08,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-02-11 00:38:08,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-11 00:38:08,468 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1255182127, now seen corresponding path program 239 times [2022-02-11 00:38:08,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:08,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179817031] [2022-02-11 00:38:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:08,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:08,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179817031] [2022-02-11 00:38:08,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179817031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:08,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104121313] [2022-02-11 00:38:08,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:08,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:08,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:08,683 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:08,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-11 00:38:08,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:08,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:09,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 244 [2022-02-11 00:38:09,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:09,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-02-11 00:38:09,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-02-11 00:38:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:09,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:10,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 218 [2022-02-11 00:38:10,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 281 [2022-02-11 00:38:10,484 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:10,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 253 [2022-02-11 00:38:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:10,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104121313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:10,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:10,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:10,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389038519] [2022-02-11 00:38:10,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:10,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:10,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:10,743 INFO L87 Difference]: Start difference. First operand 1065 states and 3585 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:11,339 INFO L93 Difference]: Finished difference Result 1507 states and 4856 transitions. [2022-02-11 00:38:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:38:11,339 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:11,342 INFO L225 Difference]: With dead ends: 1507 [2022-02-11 00:38:11,342 INFO L226 Difference]: Without dead ends: 1436 [2022-02-11 00:38:11,342 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:38:11,342 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 134 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:11,342 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 569 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 876 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-02-11 00:38:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-02-11 00:38:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1069. [2022-02-11 00:38:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.3670411985018727) internal successors, (3596), 1068 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3596 transitions. [2022-02-11 00:38:11,355 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3596 transitions. Word has length 23 [2022-02-11 00:38:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:11,356 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 3596 transitions. [2022-02-11 00:38:11,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3596 transitions. [2022-02-11 00:38:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:11,357 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:11,357 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:11,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:11,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-02-11 00:38:11,575 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1755340789, now seen corresponding path program 240 times [2022-02-11 00:38:11,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:11,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032615669] [2022-02-11 00:38:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:11,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:11,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:11,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032615669] [2022-02-11 00:38:11,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032615669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:11,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940656568] [2022-02-11 00:38:11,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:38:11,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:11,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:11,690 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:11,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-11 00:38:11,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:38:11,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:12,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-02-11 00:38:12,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:12,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 187 [2022-02-11 00:38:12,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 145 [2022-02-11 00:38:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:12,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:12,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 244 [2022-02-11 00:38:13,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-11 00:38:13,076 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:13,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 189 [2022-02-11 00:38:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:13,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940656568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:13,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:13,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:13,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061388014] [2022-02-11 00:38:13,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:13,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:13,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:13,191 INFO L87 Difference]: Start difference. First operand 1069 states and 3596 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:14,157 INFO L93 Difference]: Finished difference Result 1639 states and 5179 transitions. [2022-02-11 00:38:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:38:14,157 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:14,160 INFO L225 Difference]: With dead ends: 1639 [2022-02-11 00:38:14,160 INFO L226 Difference]: Without dead ends: 1592 [2022-02-11 00:38:14,160 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=2560, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:38:14,160 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 182 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:14,160 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 873 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1080 Invalid, 0 Unknown, 427 Unchecked, 0.3s Time] [2022-02-11 00:38:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-02-11 00:38:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1122. [2022-02-11 00:38:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.3425512934879573) internal successors, (3747), 1121 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3747 transitions. [2022-02-11 00:38:14,174 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3747 transitions. Word has length 23 [2022-02-11 00:38:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:14,174 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3747 transitions. [2022-02-11 00:38:14,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3747 transitions. [2022-02-11 00:38:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:14,175 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:14,175 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:14,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-02-11 00:38:14,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:14,379 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:14,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1346898995, now seen corresponding path program 241 times [2022-02-11 00:38:14,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:14,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229905529] [2022-02-11 00:38:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:14,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:14,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229905529] [2022-02-11 00:38:14,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229905529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:14,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328726332] [2022-02-11 00:38:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:38:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:14,484 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:14,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-11 00:38:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:14,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:38:15,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:38:15,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:15,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:38:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:15,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:15,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:38:15,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-02-11 00:38:15,895 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:15,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 183 [2022-02-11 00:38:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:16,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328726332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:16,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:16,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:38:16,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492347198] [2022-02-11 00:38:16,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:16,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:38:16,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:38:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:38:16,018 INFO L87 Difference]: Start difference. First operand 1122 states and 3747 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:16,307 INFO L93 Difference]: Finished difference Result 1612 states and 5172 transitions. [2022-02-11 00:38:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:38:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:16,310 INFO L225 Difference]: With dead ends: 1612 [2022-02-11 00:38:16,310 INFO L226 Difference]: Without dead ends: 1590 [2022-02-11 00:38:16,310 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:38:16,310 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:16,310 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 343 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 548 Invalid, 0 Unknown, 613 Unchecked, 0.2s Time] [2022-02-11 00:38:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2022-02-11 00:38:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1138. [2022-02-11 00:38:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.337730870712401) internal successors, (3795), 1137 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3795 transitions. [2022-02-11 00:38:16,323 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3795 transitions. Word has length 23 [2022-02-11 00:38:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:16,324 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 3795 transitions. [2022-02-11 00:38:16,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3795 transitions. [2022-02-11 00:38:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:16,325 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:16,325 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:16,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:16,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:16,528 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash 800499773, now seen corresponding path program 242 times [2022-02-11 00:38:16,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:16,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363019193] [2022-02-11 00:38:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:16,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:16,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:16,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363019193] [2022-02-11 00:38:16,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363019193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:16,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074163438] [2022-02-11 00:38:16,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:16,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:16,646 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:16,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-11 00:38:16,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:16,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:38:17,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:38:17,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:17,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:38:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:17,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:17,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-02-11 00:38:18,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:38:18,221 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:18,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-02-11 00:38:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:18,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074163438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:18,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:18,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:38:18,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789466269] [2022-02-11 00:38:18,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:18,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:38:18,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:18,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:38:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:38:18,390 INFO L87 Difference]: Start difference. First operand 1138 states and 3795 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:19,533 INFO L93 Difference]: Finished difference Result 1839 states and 5752 transitions. [2022-02-11 00:38:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:38:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:19,536 INFO L225 Difference]: With dead ends: 1839 [2022-02-11 00:38:19,536 INFO L226 Difference]: Without dead ends: 1716 [2022-02-11 00:38:19,537 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=2094, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:38:19,537 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 140 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:19,537 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 673 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1006 Invalid, 0 Unknown, 353 Unchecked, 0.4s Time] [2022-02-11 00:38:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-02-11 00:38:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1214. [2022-02-11 00:38:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.3050288540807915) internal successors, (4009), 1213 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4009 transitions. [2022-02-11 00:38:19,552 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4009 transitions. Word has length 23 [2022-02-11 00:38:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:19,552 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4009 transitions. [2022-02-11 00:38:19,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4009 transitions. [2022-02-11 00:38:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:19,554 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:19,554 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:19,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:19,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:19,768 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:19,768 INFO L85 PathProgramCache]: Analyzing trace with hash -45159791, now seen corresponding path program 243 times [2022-02-11 00:38:19,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:19,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775802921] [2022-02-11 00:38:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:19,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:19,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:19,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775802921] [2022-02-11 00:38:19,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775802921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:19,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484158107] [2022-02-11 00:38:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:19,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:19,886 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:19,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-11 00:38:20,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:38:20,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:38:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:20,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:38:20,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:20,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 248 [2022-02-11 00:38:20,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-02-11 00:38:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:20,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:21,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:38:21,397 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:21,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:38:21,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:38:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:21,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484158107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:21,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:21,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-02-11 00:38:21,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602451733] [2022-02-11 00:38:21,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:38:21,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:38:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:38:21,507 INFO L87 Difference]: Start difference. First operand 1214 states and 4009 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:21,925 INFO L93 Difference]: Finished difference Result 1671 states and 5342 transitions. [2022-02-11 00:38:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:38:21,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:21,928 INFO L225 Difference]: With dead ends: 1671 [2022-02-11 00:38:21,928 INFO L226 Difference]: Without dead ends: 1606 [2022-02-11 00:38:21,928 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:38:21,928 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 118 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:21,928 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 392 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 575 Unchecked, 0.1s Time] [2022-02-11 00:38:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-02-11 00:38:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1142. [2022-02-11 00:38:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.322524101665206) internal successors, (3791), 1141 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3791 transitions. [2022-02-11 00:38:21,942 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3791 transitions. Word has length 23 [2022-02-11 00:38:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:21,942 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3791 transitions. [2022-02-11 00:38:21,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3791 transitions. [2022-02-11 00:38:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:21,943 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:21,943 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:21,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:22,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:22,160 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash 254845451, now seen corresponding path program 244 times [2022-02-11 00:38:22,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:22,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419997708] [2022-02-11 00:38:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:22,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:22,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419997708] [2022-02-11 00:38:22,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419997708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:22,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449229852] [2022-02-11 00:38:22,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:22,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:22,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:22,274 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:22,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-11 00:38:22,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:22,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:22,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:38:22,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:22,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-02-11 00:38:23,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:23,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 265 [2022-02-11 00:38:23,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 229 [2022-02-11 00:38:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:23,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:23,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-02-11 00:38:23,922 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:23,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 208 [2022-02-11 00:38:23,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 183 [2022-02-11 00:38:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:24,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449229852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:24,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:24,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:38:24,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138364112] [2022-02-11 00:38:24,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:24,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:38:24,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:24,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:38:24,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:38:24,084 INFO L87 Difference]: Start difference. First operand 1142 states and 3791 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:24,708 INFO L93 Difference]: Finished difference Result 1767 states and 5549 transitions. [2022-02-11 00:38:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:38:24,708 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:24,711 INFO L225 Difference]: With dead ends: 1767 [2022-02-11 00:38:24,711 INFO L226 Difference]: Without dead ends: 1677 [2022-02-11 00:38:24,711 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:38:24,711 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:24,711 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 456 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1039 Invalid, 0 Unknown, 209 Unchecked, 0.3s Time] [2022-02-11 00:38:24,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-02-11 00:38:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 991. [2022-02-11 00:38:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.3777777777777778) internal successors, (3344), 990 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3344 transitions. [2022-02-11 00:38:24,724 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3344 transitions. Word has length 23 [2022-02-11 00:38:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:24,724 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 3344 transitions. [2022-02-11 00:38:24,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3344 transitions. [2022-02-11 00:38:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:24,725 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:24,725 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:24,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:24,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:24,942 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash 68979505, now seen corresponding path program 245 times [2022-02-11 00:38:24,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:24,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930421560] [2022-02-11 00:38:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:24,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:25,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:25,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930421560] [2022-02-11 00:38:25,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930421560] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:25,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237990996] [2022-02-11 00:38:25,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:25,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:25,053 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:25,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-11 00:38:25,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:25,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:25,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:38:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:25,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-02-11 00:38:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:25,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-02-11 00:38:25,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-02-11 00:38:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:26,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:26,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:38:26,389 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:26,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:38:26,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:38:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:26,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237990996] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:26,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:26,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:38:26,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992383114] [2022-02-11 00:38:26,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:26,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:38:26,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:26,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:38:26,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:38:26,493 INFO L87 Difference]: Start difference. First operand 991 states and 3344 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:26,875 INFO L93 Difference]: Finished difference Result 1631 states and 5169 transitions. [2022-02-11 00:38:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:38:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:26,887 INFO L225 Difference]: With dead ends: 1631 [2022-02-11 00:38:26,887 INFO L226 Difference]: Without dead ends: 1433 [2022-02-11 00:38:26,887 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:38:26,887 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:26,887 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 372 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 905 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-02-11 00:38:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-02-11 00:38:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1049. [2022-02-11 00:38:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.361641221374046) internal successors, (3523), 1048 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3523 transitions. [2022-02-11 00:38:26,899 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3523 transitions. Word has length 23 [2022-02-11 00:38:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:26,900 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 3523 transitions. [2022-02-11 00:38:26,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3523 transitions. [2022-02-11 00:38:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:26,901 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:26,901 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:26,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-02-11 00:38:27,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:27,117 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:27,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1605372777, now seen corresponding path program 246 times [2022-02-11 00:38:27,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:27,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459452843] [2022-02-11 00:38:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:27,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:27,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:27,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459452843] [2022-02-11 00:38:27,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459452843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:27,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636160062] [2022-02-11 00:38:27,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:38:27,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:27,271 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:27,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-11 00:38:27,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:38:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:27,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:27,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-02-11 00:38:28,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:28,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 232 [2022-02-11 00:38:28,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 180 [2022-02-11 00:38:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:28,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:28,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 360 treesize of output 324 [2022-02-11 00:38:28,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:38:28,911 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:28,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-02-11 00:38:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:29,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636160062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:29,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:29,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:38:29,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230628676] [2022-02-11 00:38:29,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:29,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:38:29,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:38:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:38:29,014 INFO L87 Difference]: Start difference. First operand 1049 states and 3523 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:29,718 INFO L93 Difference]: Finished difference Result 1424 states and 4631 transitions. [2022-02-11 00:38:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:38:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:29,720 INFO L225 Difference]: With dead ends: 1424 [2022-02-11 00:38:29,720 INFO L226 Difference]: Without dead ends: 1381 [2022-02-11 00:38:29,720 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:38:29,720 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 164 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:29,720 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 487 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1126 Invalid, 0 Unknown, 584 Unchecked, 0.3s Time] [2022-02-11 00:38:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-02-11 00:38:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1047. [2022-02-11 00:38:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.361376673040153) internal successors, (3516), 1046 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3516 transitions. [2022-02-11 00:38:29,732 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3516 transitions. Word has length 23 [2022-02-11 00:38:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:29,732 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3516 transitions. [2022-02-11 00:38:29,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3516 transitions. [2022-02-11 00:38:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:29,734 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:29,734 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:29,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:29,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:29,950 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash 220828289, now seen corresponding path program 247 times [2022-02-11 00:38:29,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:29,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264173964] [2022-02-11 00:38:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:29,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:30,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:30,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264173964] [2022-02-11 00:38:30,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264173964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:30,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953763544] [2022-02-11 00:38:30,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:38:30,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:30,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:30,053 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:30,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-11 00:38:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:30,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-02-11 00:38:30,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-02-11 00:38:30,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:30,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-02-11 00:38:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:31,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:31,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-02-11 00:38:31,581 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:31,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 237 [2022-02-11 00:38:31,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 209 [2022-02-11 00:38:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:31,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953763544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:31,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:31,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:31,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831191479] [2022-02-11 00:38:31,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:31,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:31,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:31,693 INFO L87 Difference]: Start difference. First operand 1047 states and 3516 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:32,639 INFO L93 Difference]: Finished difference Result 1712 states and 5459 transitions. [2022-02-11 00:38:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:38:32,639 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:32,642 INFO L225 Difference]: With dead ends: 1712 [2022-02-11 00:38:32,642 INFO L226 Difference]: Without dead ends: 1561 [2022-02-11 00:38:32,642 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=2852, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:38:32,643 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 183 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:32,643 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 651 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1155 Invalid, 0 Unknown, 1133 Unchecked, 0.3s Time] [2022-02-11 00:38:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2022-02-11 00:38:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1067. [2022-02-11 00:38:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.354596622889306) internal successors, (3576), 1066 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3576 transitions. [2022-02-11 00:38:32,656 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3576 transitions. Word has length 23 [2022-02-11 00:38:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:32,656 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3576 transitions. [2022-02-11 00:38:32,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3576 transitions. [2022-02-11 00:38:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:32,657 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:32,657 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:32,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:32,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-11 00:38:32,874 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1551787715, now seen corresponding path program 248 times [2022-02-11 00:38:32,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:32,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870377771] [2022-02-11 00:38:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:32,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:32,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870377771] [2022-02-11 00:38:32,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870377771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:32,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849091658] [2022-02-11 00:38:32,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:32,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:32,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:32,956 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:32,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-11 00:38:33,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:33,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:33,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-02-11 00:38:33,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:38:33,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:33,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:38:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:33,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:33,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:38:34,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-11 00:38:34,292 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:34,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 189 [2022-02-11 00:38:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:34,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849091658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:34,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:34,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:38:34,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518203751] [2022-02-11 00:38:34,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:34,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:38:34,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:38:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:38:34,425 INFO L87 Difference]: Start difference. First operand 1067 states and 3576 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:34,627 INFO L93 Difference]: Finished difference Result 1328 states and 4317 transitions. [2022-02-11 00:38:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:38:34,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:34,629 INFO L225 Difference]: With dead ends: 1328 [2022-02-11 00:38:34,630 INFO L226 Difference]: Without dead ends: 1274 [2022-02-11 00:38:34,630 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:38:34,630 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:34,630 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 229 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-02-11 00:38:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-02-11 00:38:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1090. [2022-02-11 00:38:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.3425160697887972) internal successors, (3640), 1089 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3640 transitions. [2022-02-11 00:38:34,641 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3640 transitions. Word has length 23 [2022-02-11 00:38:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:34,642 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 3640 transitions. [2022-02-11 00:38:34,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3640 transitions. [2022-02-11 00:38:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:34,643 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:34,643 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:34,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-02-11 00:38:34,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-11 00:38:34,859 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 165612887, now seen corresponding path program 249 times [2022-02-11 00:38:34,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:34,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509255605] [2022-02-11 00:38:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:34,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:34,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:34,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509255605] [2022-02-11 00:38:34,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509255605] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:34,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202311064] [2022-02-11 00:38:34,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:34,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:34,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:34,928 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:34,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-11 00:38:35,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:38:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:35,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 356 treesize of output 300 [2022-02-11 00:38:35,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:35,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-02-11 00:38:35,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-02-11 00:38:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:35,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:36,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-02-11 00:38:36,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-02-11 00:38:36,405 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:36,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 236 [2022-02-11 00:38:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:36,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202311064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:36,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:36,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:38:36,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521632460] [2022-02-11 00:38:36,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:36,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:38:36,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:38:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:38:36,521 INFO L87 Difference]: Start difference. First operand 1090 states and 3640 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:36,713 INFO L93 Difference]: Finished difference Result 1292 states and 4241 transitions. [2022-02-11 00:38:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:38:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:36,715 INFO L225 Difference]: With dead ends: 1292 [2022-02-11 00:38:36,715 INFO L226 Difference]: Without dead ends: 1249 [2022-02-11 00:38:36,715 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:36,715 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:36,715 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 620 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-02-11 00:38:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-02-11 00:38:36,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1090. [2022-02-11 00:38:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.3425160697887972) internal successors, (3640), 1089 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3640 transitions. [2022-02-11 00:38:36,727 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3640 transitions. Word has length 23 [2022-02-11 00:38:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:36,727 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 3640 transitions. [2022-02-11 00:38:36,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3640 transitions. [2022-02-11 00:38:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:36,728 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:36,728 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:36,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:36,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-02-11 00:38:36,945 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1593676253, now seen corresponding path program 250 times [2022-02-11 00:38:36,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:36,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138085607] [2022-02-11 00:38:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:36,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:37,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:37,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138085607] [2022-02-11 00:38:37,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138085607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:37,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581149624] [2022-02-11 00:38:37,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:37,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:37,067 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:37,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-11 00:38:37,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:37,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:37,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:37,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-02-11 00:38:37,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:37,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 233 [2022-02-11 00:38:37,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 181 [2022-02-11 00:38:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:38,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:38,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-02-11 00:38:38,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:38:38,772 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:38,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-02-11 00:38:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:38,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581149624] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:38,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:38,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:38,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846991981] [2022-02-11 00:38:38,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:38,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:38,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:38,956 INFO L87 Difference]: Start difference. First operand 1090 states and 3640 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:40,196 INFO L93 Difference]: Finished difference Result 1789 states and 5516 transitions. [2022-02-11 00:38:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:38:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:40,198 INFO L225 Difference]: With dead ends: 1789 [2022-02-11 00:38:40,198 INFO L226 Difference]: Without dead ends: 1599 [2022-02-11 00:38:40,199 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=2372, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:38:40,199 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 185 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:40,199 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 807 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1650 Invalid, 0 Unknown, 582 Unchecked, 0.5s Time] [2022-02-11 00:38:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-02-11 00:38:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1116. [2022-02-11 00:38:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.3309417040358746) internal successors, (3714), 1115 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3714 transitions. [2022-02-11 00:38:40,213 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3714 transitions. Word has length 23 [2022-02-11 00:38:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:40,213 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3714 transitions. [2022-02-11 00:38:40,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3714 transitions. [2022-02-11 00:38:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:40,214 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:40,214 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:40,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:40,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-11 00:38:40,431 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash 93033907, now seen corresponding path program 251 times [2022-02-11 00:38:40,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:40,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841724656] [2022-02-11 00:38:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:40,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:40,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:40,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841724656] [2022-02-11 00:38:40,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841724656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:40,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083746200] [2022-02-11 00:38:40,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:40,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:40,524 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:40,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-11 00:38:40,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:38:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:40,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 233 [2022-02-11 00:38:41,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:38:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:41,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:38:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:41,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:41,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 276 [2022-02-11 00:38:42,157 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:42,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 291 [2022-02-11 00:38:42,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 251 [2022-02-11 00:38:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:42,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083746200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:42,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:42,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:42,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925057074] [2022-02-11 00:38:42,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:42,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:42,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:42,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:42,292 INFO L87 Difference]: Start difference. First operand 1116 states and 3714 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:44,224 INFO L93 Difference]: Finished difference Result 2916 states and 8992 transitions. [2022-02-11 00:38:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:38:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:44,228 INFO L225 Difference]: With dead ends: 2916 [2022-02-11 00:38:44,228 INFO L226 Difference]: Without dead ends: 2400 [2022-02-11 00:38:44,228 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=769, Invalid=6713, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 00:38:44,229 INFO L934 BasicCegarLoop]: 57 mSDtfsCounter, 277 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:44,229 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 875 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1893 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2022-02-11 00:38:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-02-11 00:38:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1267. [2022-02-11 00:38:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.287519747235387) internal successors, (4162), 1266 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4162 transitions. [2022-02-11 00:38:44,247 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4162 transitions. Word has length 23 [2022-02-11 00:38:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:44,247 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 4162 transitions. [2022-02-11 00:38:44,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4162 transitions. [2022-02-11 00:38:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:44,249 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:44,249 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:44,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:44,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:44,466 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1844539249, now seen corresponding path program 252 times [2022-02-11 00:38:44,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:44,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25085770] [2022-02-11 00:38:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:44,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:44,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:44,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25085770] [2022-02-11 00:38:44,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25085770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:44,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421364047] [2022-02-11 00:38:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:38:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:44,551 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:44,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-11 00:38:44,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:38:44,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:44,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:44,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 233 [2022-02-11 00:38:45,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:45,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-02-11 00:38:45,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-02-11 00:38:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:45,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:45,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 286 [2022-02-11 00:38:46,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-02-11 00:38:46,034 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:46,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-02-11 00:38:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:46,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421364047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:46,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:46,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:46,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294815715] [2022-02-11 00:38:46,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:46,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:46,142 INFO L87 Difference]: Start difference. First operand 1267 states and 4162 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:46,958 INFO L93 Difference]: Finished difference Result 2103 states and 6556 transitions. [2022-02-11 00:38:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:38:46,958 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:46,961 INFO L225 Difference]: With dead ends: 2103 [2022-02-11 00:38:46,961 INFO L226 Difference]: Without dead ends: 1971 [2022-02-11 00:38:46,962 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=2659, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:38:46,962 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 183 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:46,962 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 703 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1246 Invalid, 0 Unknown, 537 Unchecked, 0.3s Time] [2022-02-11 00:38:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-02-11 00:38:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1313. [2022-02-11 00:38:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 3.276676829268293) internal successors, (4299), 1312 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 4299 transitions. [2022-02-11 00:38:46,979 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 4299 transitions. Word has length 23 [2022-02-11 00:38:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:46,979 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 4299 transitions. [2022-02-11 00:38:46,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 4299 transitions. [2022-02-11 00:38:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:46,980 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:46,980 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:46,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:47,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-02-11 00:38:47,198 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1649274903, now seen corresponding path program 253 times [2022-02-11 00:38:47,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:47,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036826605] [2022-02-11 00:38:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:47,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:47,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036826605] [2022-02-11 00:38:47,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036826605] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:47,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461744731] [2022-02-11 00:38:47,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:38:47,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:47,290 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:47,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-11 00:38:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:47,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-02-11 00:38:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:48,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-02-11 00:38:48,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-02-11 00:38:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:48,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:48,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 217 [2022-02-11 00:38:48,642 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:48,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:38:48,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:38:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:48,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461744731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:48,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:48,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:38:48,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068924757] [2022-02-11 00:38:48,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:48,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:48,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:48,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:48,752 INFO L87 Difference]: Start difference. First operand 1313 states and 4299 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:49,456 INFO L93 Difference]: Finished difference Result 1795 states and 5603 transitions. [2022-02-11 00:38:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:38:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:49,459 INFO L225 Difference]: With dead ends: 1795 [2022-02-11 00:38:49,459 INFO L226 Difference]: Without dead ends: 1717 [2022-02-11 00:38:49,460 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:38:49,460 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 157 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:49,460 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 711 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1268 Invalid, 0 Unknown, 658 Unchecked, 0.3s Time] [2022-02-11 00:38:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-02-11 00:38:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1256. [2022-02-11 00:38:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.2916334661354583) internal successors, (4131), 1255 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4131 transitions. [2022-02-11 00:38:49,477 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4131 transitions. Word has length 23 [2022-02-11 00:38:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 4131 transitions. [2022-02-11 00:38:49,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4131 transitions. [2022-02-11 00:38:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:49,479 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:49,479 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:49,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-02-11 00:38:49,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:49,694 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash -674292977, now seen corresponding path program 254 times [2022-02-11 00:38:49,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:49,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553733962] [2022-02-11 00:38:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:49,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:49,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553733962] [2022-02-11 00:38:49,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553733962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:49,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740089093] [2022-02-11 00:38:49,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:49,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:49,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:49,798 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:49,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-11 00:38:50,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:50,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:50,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 224 [2022-02-11 00:38:50,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 170 [2022-02-11 00:38:50,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:50,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-02-11 00:38:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:51,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:51,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:38:51,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-02-11 00:38:51,561 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:51,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 236 [2022-02-11 00:38:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:51,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740089093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:51,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:51,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:38:51,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066903170] [2022-02-11 00:38:51,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:51,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:38:51,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:38:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:38:51,712 INFO L87 Difference]: Start difference. First operand 1256 states and 4131 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:52,538 INFO L93 Difference]: Finished difference Result 1883 states and 5921 transitions. [2022-02-11 00:38:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:38:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:52,541 INFO L225 Difference]: With dead ends: 1883 [2022-02-11 00:38:52,541 INFO L226 Difference]: Without dead ends: 1752 [2022-02-11 00:38:52,541 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:38:52,541 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 198 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:52,541 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 588 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1275 Invalid, 0 Unknown, 615 Unchecked, 0.3s Time] [2022-02-11 00:38:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-02-11 00:38:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1267. [2022-02-11 00:38:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.2914691943127963) internal successors, (4167), 1266 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4167 transitions. [2022-02-11 00:38:52,557 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4167 transitions. Word has length 23 [2022-02-11 00:38:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:52,557 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 4167 transitions. [2022-02-11 00:38:52,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4167 transitions. [2022-02-11 00:38:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:52,558 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:52,558 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:52,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:52,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:52,775 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1987599061, now seen corresponding path program 255 times [2022-02-11 00:38:52,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:52,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420992856] [2022-02-11 00:38:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:52,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:52,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420992856] [2022-02-11 00:38:52,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420992856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:52,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970401561] [2022-02-11 00:38:52,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:52,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:52,835 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:52,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-11 00:38:53,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:38:53,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:53,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:53,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:53,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-02-11 00:38:53,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:38:53,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:53,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:38:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:53,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:54,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-02-11 00:38:54,614 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:54,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 280 [2022-02-11 00:38:54,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 236 [2022-02-11 00:38:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:54,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970401561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:54,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:54,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:38:54,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12629292] [2022-02-11 00:38:54,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:54,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:38:54,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:38:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:38:54,865 INFO L87 Difference]: Start difference. First operand 1267 states and 4167 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:55,030 INFO L93 Difference]: Finished difference Result 1656 states and 5234 transitions. [2022-02-11 00:38:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:38:55,030 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:55,033 INFO L225 Difference]: With dead ends: 1656 [2022-02-11 00:38:55,034 INFO L226 Difference]: Without dead ends: 1637 [2022-02-11 00:38:55,034 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:38:55,034 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:55,034 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 198 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-02-11 00:38:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2022-02-11 00:38:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1333. [2022-02-11 00:38:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.2687687687687688) internal successors, (4354), 1332 states have internal predecessors, (4354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4354 transitions. [2022-02-11 00:38:55,054 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4354 transitions. Word has length 23 [2022-02-11 00:38:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:55,054 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 4354 transitions. [2022-02-11 00:38:55,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4354 transitions. [2022-02-11 00:38:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:55,056 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:55,056 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:55,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:55,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:55,272 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1276997091, now seen corresponding path program 256 times [2022-02-11 00:38:55,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:55,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540857188] [2022-02-11 00:38:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:55,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:55,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:55,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540857188] [2022-02-11 00:38:55,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540857188] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:55,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101669207] [2022-02-11 00:38:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:55,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:55,397 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:55,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-11 00:38:55,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:55,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:55,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-02-11 00:38:56,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:56,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-02-11 00:38:56,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-02-11 00:38:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:56,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 194 [2022-02-11 00:38:57,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-02-11 00:38:57,070 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:57,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-02-11 00:38:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:57,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101669207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:57,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:57,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-11 00:38:57,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699222817] [2022-02-11 00:38:57,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:57,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:38:57,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:38:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:38:57,271 INFO L87 Difference]: Start difference. First operand 1333 states and 4354 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:58,107 INFO L93 Difference]: Finished difference Result 2055 states and 6386 transitions. [2022-02-11 00:38:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:38:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:38:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:58,111 INFO L225 Difference]: With dead ends: 2055 [2022-02-11 00:38:58,111 INFO L226 Difference]: Without dead ends: 1998 [2022-02-11 00:38:58,111 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:38:58,111 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 163 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:58,111 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 682 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1471 Invalid, 0 Unknown, 448 Unchecked, 0.4s Time] [2022-02-11 00:38:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-02-11 00:38:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1326. [2022-02-11 00:38:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.2739622641509434) internal successors, (4338), 1325 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 4338 transitions. [2022-02-11 00:38:58,129 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 4338 transitions. Word has length 23 [2022-02-11 00:38:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:58,129 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 4338 transitions. [2022-02-11 00:38:58,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 4338 transitions. [2022-02-11 00:38:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:38:58,130 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:58,131 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:58,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:58,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:58,348 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:38:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1234605467, now seen corresponding path program 257 times [2022-02-11 00:38:58,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:58,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836339853] [2022-02-11 00:38:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:58,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:58,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:58,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836339853] [2022-02-11 00:38:58,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836339853] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:58,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835517862] [2022-02-11 00:38:58,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:58,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:58,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:58,422 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:58,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-11 00:38:58,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:38:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:38:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:58,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 193 [2022-02-11 00:38:59,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:59,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 188 [2022-02-11 00:38:59,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-02-11 00:38:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:59,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:38:59,808 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:38:59,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 273 [2022-02-11 00:38:59,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2022-02-11 00:38:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:38:59,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835517862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:59,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:59,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:38:59,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947776497] [2022-02-11 00:38:59,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:59,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:38:59,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:38:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:38:59,928 INFO L87 Difference]: Start difference. First operand 1326 states and 4338 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:00,521 INFO L93 Difference]: Finished difference Result 1863 states and 6019 transitions. [2022-02-11 00:39:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:39:00,521 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:00,524 INFO L225 Difference]: With dead ends: 1863 [2022-02-11 00:39:00,524 INFO L226 Difference]: Without dead ends: 1724 [2022-02-11 00:39:00,524 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:39:00,525 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:00,525 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 557 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1058 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-02-11 00:39:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-02-11 00:39:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1374. [2022-02-11 00:39:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.2949745083758195) internal successors, (4524), 1373 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4524 transitions. [2022-02-11 00:39:00,540 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4524 transitions. Word has length 23 [2022-02-11 00:39:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:00,540 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 4524 transitions. [2022-02-11 00:39:00,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4524 transitions. [2022-02-11 00:39:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:00,542 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:00,542 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:00,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-02-11 00:39:00,759 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash 733952071, now seen corresponding path program 258 times [2022-02-11 00:39:00,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:00,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540191568] [2022-02-11 00:39:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:00,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:00,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:00,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540191568] [2022-02-11 00:39:00,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540191568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:00,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33342426] [2022-02-11 00:39:00,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:00,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:00,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:00,832 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:00,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-11 00:39:01,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:39:01,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:01,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 150 [2022-02-11 00:39:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:01,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-02-11 00:39:01,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 139 [2022-02-11 00:39:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:01,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:01,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:39:02,399 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:39:02,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 210 [2022-02-11 00:39:02,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 172 [2022-02-11 00:39:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:02,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33342426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:02,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:02,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:39:02,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965460830] [2022-02-11 00:39:02,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:02,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:39:02,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:39:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:39:02,555 INFO L87 Difference]: Start difference. First operand 1374 states and 4524 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:03,473 INFO L93 Difference]: Finished difference Result 1796 states and 5804 transitions. [2022-02-11 00:39:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:39:03,473 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:03,476 INFO L225 Difference]: With dead ends: 1796 [2022-02-11 00:39:03,476 INFO L226 Difference]: Without dead ends: 1705 [2022-02-11 00:39:03,476 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:39:03,476 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 77 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:03,477 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 572 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1237 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2022-02-11 00:39:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-02-11 00:39:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1379. [2022-02-11 00:39:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.298258345428157) internal successors, (4545), 1378 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4545 transitions. [2022-02-11 00:39:03,494 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4545 transitions. Word has length 23 [2022-02-11 00:39:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:03,494 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 4545 transitions. [2022-02-11 00:39:03,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4545 transitions. [2022-02-11 00:39:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:03,495 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:03,495 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:03,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:03,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-02-11 00:39:03,712 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1203625627, now seen corresponding path program 259 times [2022-02-11 00:39:03,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:03,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533260834] [2022-02-11 00:39:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:03,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:03,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533260834] [2022-02-11 00:39:03,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533260834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:03,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407766287] [2022-02-11 00:39:03,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:39:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:03,841 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:03,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-11 00:39:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:04,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:04,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-02-11 00:39:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:04,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 175 [2022-02-11 00:39:04,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-02-11 00:39:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:04,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:05,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-02-11 00:39:05,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-02-11 00:39:05,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:05,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 249 [2022-02-11 00:39:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:05,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407766287] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:05,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:05,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:39:05,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777244415] [2022-02-11 00:39:05,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:05,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:39:05,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:39:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:05,941 INFO L87 Difference]: Start difference. First operand 1379 states and 4545 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:06,484 INFO L93 Difference]: Finished difference Result 1800 states and 5814 transitions. [2022-02-11 00:39:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:39:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:06,487 INFO L225 Difference]: With dead ends: 1800 [2022-02-11 00:39:06,487 INFO L226 Difference]: Without dead ends: 1726 [2022-02-11 00:39:06,488 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:39:06,488 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:06,488 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 249 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 725 Invalid, 0 Unknown, 194 Unchecked, 0.3s Time] [2022-02-11 00:39:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2022-02-11 00:39:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1386. [2022-02-11 00:39:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.3090252707581227) internal successors, (4583), 1385 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4583 transitions. [2022-02-11 00:39:06,503 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4583 transitions. Word has length 23 [2022-02-11 00:39:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 4583 transitions. [2022-02-11 00:39:06,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4583 transitions. [2022-02-11 00:39:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:06,505 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:06,505 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:06,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:06,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-11 00:39:06,707 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1068312533, now seen corresponding path program 260 times [2022-02-11 00:39:06,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:06,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529444882] [2022-02-11 00:39:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:06,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:06,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:06,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529444882] [2022-02-11 00:39:06,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529444882] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:06,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735433766] [2022-02-11 00:39:06,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:39:06,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:06,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:06,843 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:06,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-11 00:39:07,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:07,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:07,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-02-11 00:39:07,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:07,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-02-11 00:39:07,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-02-11 00:39:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:07,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:07,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:39:08,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 268 [2022-02-11 00:39:08,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:08,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 251 [2022-02-11 00:39:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:08,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735433766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:08,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:08,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:39:08,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775779939] [2022-02-11 00:39:08,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:08,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:39:08,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:39:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:39:08,288 INFO L87 Difference]: Start difference. First operand 1386 states and 4583 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:10,033 INFO L93 Difference]: Finished difference Result 2034 states and 6352 transitions. [2022-02-11 00:39:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:39:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:10,037 INFO L225 Difference]: With dead ends: 2034 [2022-02-11 00:39:10,037 INFO L226 Difference]: Without dead ends: 1867 [2022-02-11 00:39:10,037 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=395, Invalid=3387, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:39:10,037 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 170 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:10,038 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 692 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1377 Invalid, 0 Unknown, 449 Unchecked, 0.5s Time] [2022-02-11 00:39:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2022-02-11 00:39:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1351. [2022-02-11 00:39:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.2785185185185184) internal successors, (4426), 1350 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4426 transitions. [2022-02-11 00:39:10,054 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4426 transitions. Word has length 23 [2022-02-11 00:39:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:10,055 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 4426 transitions. [2022-02-11 00:39:10,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4426 transitions. [2022-02-11 00:39:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:10,056 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:10,056 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:10,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-02-11 00:39:10,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:10,266 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1727972133, now seen corresponding path program 261 times [2022-02-11 00:39:10,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:10,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813075220] [2022-02-11 00:39:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:10,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:10,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:10,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813075220] [2022-02-11 00:39:10,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813075220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:10,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003782197] [2022-02-11 00:39:10,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:39:10,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:10,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:10,381 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:10,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-11 00:39:10,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:39:10,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:10,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:10,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:39:11,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:11,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-02-11 00:39:11,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-02-11 00:39:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:11,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:11,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-02-11 00:39:11,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-02-11 00:39:11,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:11,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 302 treesize of output 264 [2022-02-11 00:39:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:12,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003782197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:12,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:12,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:39:12,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919972266] [2022-02-11 00:39:12,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:12,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:39:12,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:12,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:39:12,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:12,197 INFO L87 Difference]: Start difference. First operand 1351 states and 4426 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:12,449 INFO L93 Difference]: Finished difference Result 1590 states and 5104 transitions. [2022-02-11 00:39:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:39:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:12,451 INFO L225 Difference]: With dead ends: 1590 [2022-02-11 00:39:12,451 INFO L226 Difference]: Without dead ends: 1528 [2022-02-11 00:39:12,451 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:39:12,451 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:12,451 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 206 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 510 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-02-11 00:39:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-02-11 00:39:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1345. [2022-02-11 00:39:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.2819940476190474) internal successors, (4411), 1344 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4411 transitions. [2022-02-11 00:39:12,467 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4411 transitions. Word has length 23 [2022-02-11 00:39:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:12,467 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4411 transitions. [2022-02-11 00:39:12,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4411 transitions. [2022-02-11 00:39:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:12,469 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:12,469 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:12,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:12,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-11 00:39:12,673 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1340709133, now seen corresponding path program 262 times [2022-02-11 00:39:12,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:12,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371286984] [2022-02-11 00:39:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:12,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:12,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:12,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371286984] [2022-02-11 00:39:12,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371286984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:12,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754283454] [2022-02-11 00:39:12,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:39:12,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:12,836 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:12,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-11 00:39:13,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:39:13,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:13,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:39:13,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:39:13,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:13,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:39:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:13,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:13,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-02-11 00:39:13,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 287 [2022-02-11 00:39:13,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:13,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 266 [2022-02-11 00:39:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:14,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754283454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:14,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:14,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:39:14,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175144867] [2022-02-11 00:39:14,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:14,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:39:14,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:39:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:39:14,168 INFO L87 Difference]: Start difference. First operand 1345 states and 4411 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:14,773 INFO L93 Difference]: Finished difference Result 1745 states and 5444 transitions. [2022-02-11 00:39:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:39:14,773 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:14,776 INFO L225 Difference]: With dead ends: 1745 [2022-02-11 00:39:14,776 INFO L226 Difference]: Without dead ends: 1638 [2022-02-11 00:39:14,776 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 00:39:14,777 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 111 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:14,777 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 553 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1179 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-02-11 00:39:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-02-11 00:39:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1384. [2022-02-11 00:39:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 3.274765003615329) internal successors, (4529), 1383 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 4529 transitions. [2022-02-11 00:39:14,792 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 4529 transitions. Word has length 23 [2022-02-11 00:39:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:14,792 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 4529 transitions. [2022-02-11 00:39:14,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 4529 transitions. [2022-02-11 00:39:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:14,794 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:14,794 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:14,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:15,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-02-11 00:39:15,004 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:15,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1691223081, now seen corresponding path program 263 times [2022-02-11 00:39:15,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:15,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908030932] [2022-02-11 00:39:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:15,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:15,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:15,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908030932] [2022-02-11 00:39:15,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908030932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:15,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523748199] [2022-02-11 00:39:15,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:39:15,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:15,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:15,143 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:15,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-11 00:39:15,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:39:15,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:15,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:15,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:15,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-02-11 00:39:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:15,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 240 [2022-02-11 00:39:15,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 208 [2022-02-11 00:39:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:16,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:16,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-02-11 00:39:16,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:39:16,923 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:39:16,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-02-11 00:39:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:17,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523748199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:17,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:17,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:39:17,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714732636] [2022-02-11 00:39:17,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:17,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:39:17,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:39:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:39:17,018 INFO L87 Difference]: Start difference. First operand 1384 states and 4529 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:18,185 INFO L93 Difference]: Finished difference Result 2227 states and 6953 transitions. [2022-02-11 00:39:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:39:18,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:18,189 INFO L225 Difference]: With dead ends: 2227 [2022-02-11 00:39:18,189 INFO L226 Difference]: Without dead ends: 2045 [2022-02-11 00:39:18,189 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=2657, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:39:18,189 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 123 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:18,189 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 672 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1255 Invalid, 0 Unknown, 274 Unchecked, 0.4s Time] [2022-02-11 00:39:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2022-02-11 00:39:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1461. [2022-02-11 00:39:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.2815068493150683) internal successors, (4791), 1460 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4791 transitions. [2022-02-11 00:39:18,208 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4791 transitions. Word has length 23 [2022-02-11 00:39:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:18,208 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4791 transitions. [2022-02-11 00:39:18,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4791 transitions. [2022-02-11 00:39:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:18,210 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:18,210 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:18,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-02-11 00:39:18,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:18,427 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash 146976779, now seen corresponding path program 264 times [2022-02-11 00:39:18,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:18,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341802641] [2022-02-11 00:39:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:18,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:18,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:18,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341802641] [2022-02-11 00:39:18,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341802641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:18,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641698052] [2022-02-11 00:39:18,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:18,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:18,514 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:18,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-11 00:39:18,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:39:18,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:39:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:18,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 188 [2022-02-11 00:39:19,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:39:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:19,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:39:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:19,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:19,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-02-11 00:39:19,827 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:39:19,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 273 [2022-02-11 00:39:19,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2022-02-11 00:39:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:19,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641698052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:19,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:19,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:39:19,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988032942] [2022-02-11 00:39:19,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:19,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:39:19,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:39:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:19,985 INFO L87 Difference]: Start difference. First operand 1461 states and 4791 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:20,668 INFO L93 Difference]: Finished difference Result 2299 states and 7244 transitions. [2022-02-11 00:39:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:39:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:20,672 INFO L225 Difference]: With dead ends: 2299 [2022-02-11 00:39:20,672 INFO L226 Difference]: Without dead ends: 2144 [2022-02-11 00:39:20,673 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:39:20,673 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:20,673 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 628 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1251 Invalid, 0 Unknown, 406 Unchecked, 0.3s Time] [2022-02-11 00:39:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-02-11 00:39:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1524. [2022-02-11 00:39:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.2823374917925148) internal successors, (4999), 1523 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4999 transitions. [2022-02-11 00:39:20,696 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4999 transitions. Word has length 23 [2022-02-11 00:39:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:20,696 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 4999 transitions. [2022-02-11 00:39:20,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4999 transitions. [2022-02-11 00:39:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:20,698 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:20,698 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:20,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:20,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-02-11 00:39:20,912 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2006278679, now seen corresponding path program 265 times [2022-02-11 00:39:20,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:20,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000117795] [2022-02-11 00:39:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:20,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:21,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:21,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000117795] [2022-02-11 00:39:21,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000117795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:21,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171662884] [2022-02-11 00:39:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:39:21,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:21,039 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:21,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-11 00:39:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:21,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-02-11 00:39:21,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:21,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 167 [2022-02-11 00:39:21,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-02-11 00:39:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:21,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:21,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-02-11 00:39:22,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 249 [2022-02-11 00:39:22,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:22,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 222 [2022-02-11 00:39:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:22,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171662884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:22,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:22,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:39:22,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335561260] [2022-02-11 00:39:22,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:22,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:39:22,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:39:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:39:22,465 INFO L87 Difference]: Start difference. First operand 1524 states and 4999 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:23,267 INFO L93 Difference]: Finished difference Result 2119 states and 6743 transitions. [2022-02-11 00:39:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:39:23,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:23,272 INFO L225 Difference]: With dead ends: 2119 [2022-02-11 00:39:23,272 INFO L226 Difference]: Without dead ends: 1968 [2022-02-11 00:39:23,272 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:39:23,272 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 230 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:23,272 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 314 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1090 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2022-02-11 00:39:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-02-11 00:39:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1503. [2022-02-11 00:39:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.2942743009320905) internal successors, (4948), 1502 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 4948 transitions. [2022-02-11 00:39:23,290 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 4948 transitions. Word has length 23 [2022-02-11 00:39:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:23,290 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 4948 transitions. [2022-02-11 00:39:23,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 4948 transitions. [2022-02-11 00:39:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:23,292 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:23,292 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:23,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:23,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:23,509 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:23,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1448587413, now seen corresponding path program 266 times [2022-02-11 00:39:23,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:23,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602812244] [2022-02-11 00:39:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:23,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:23,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:23,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602812244] [2022-02-11 00:39:23,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602812244] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:23,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603653263] [2022-02-11 00:39:23,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:39:23,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:23,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:23,620 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:23,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-11 00:39:23,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:39:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:24,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-02-11 00:39:24,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:39:24,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:24,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:39:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:24,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:24,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:39:25,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-02-11 00:39:25,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:25,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 253 [2022-02-11 00:39:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:25,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603653263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:25,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:25,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:39:25,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140594767] [2022-02-11 00:39:25,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:25,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:39:25,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:39:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:25,517 INFO L87 Difference]: Start difference. First operand 1503 states and 4948 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:26,199 INFO L93 Difference]: Finished difference Result 2025 states and 6415 transitions. [2022-02-11 00:39:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:39:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:26,202 INFO L225 Difference]: With dead ends: 2025 [2022-02-11 00:39:26,202 INFO L226 Difference]: Without dead ends: 1828 [2022-02-11 00:39:26,203 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:39:26,203 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:26,203 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 510 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1216 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2022-02-11 00:39:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-02-11 00:39:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1552. [2022-02-11 00:39:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.3120567375886525) internal successors, (5137), 1551 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5137 transitions. [2022-02-11 00:39:26,221 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5137 transitions. Word has length 23 [2022-02-11 00:39:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:26,221 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5137 transitions. [2022-02-11 00:39:26,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5137 transitions. [2022-02-11 00:39:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:26,223 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:26,223 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:26,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:26,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:26,429 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2083891563, now seen corresponding path program 267 times [2022-02-11 00:39:26,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:26,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777300321] [2022-02-11 00:39:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:26,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:26,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:26,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777300321] [2022-02-11 00:39:26,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777300321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:26,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683949783] [2022-02-11 00:39:26,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:39:26,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:26,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:26,523 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:26,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-11 00:39:26,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:39:26,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:26,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:26,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:26,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 184 [2022-02-11 00:39:27,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:39:27,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:27,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:39:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:27,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:27,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-02-11 00:39:27,989 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:39:27,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 275 [2022-02-11 00:39:27,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 221 [2022-02-11 00:39:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:28,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683949783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:28,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:28,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:39:28,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232888836] [2022-02-11 00:39:28,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:28,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:39:28,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:39:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:39:28,155 INFO L87 Difference]: Start difference. First operand 1552 states and 5137 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:29,015 INFO L93 Difference]: Finished difference Result 2203 states and 7053 transitions. [2022-02-11 00:39:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:39:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:29,019 INFO L225 Difference]: With dead ends: 2203 [2022-02-11 00:39:29,019 INFO L226 Difference]: Without dead ends: 2061 [2022-02-11 00:39:29,019 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:39:29,020 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 113 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:29,020 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 544 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 987 Invalid, 0 Unknown, 326 Unchecked, 0.3s Time] [2022-02-11 00:39:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-02-11 00:39:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1603. [2022-02-11 00:39:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.309612983770287) internal successors, (5302), 1602 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5302 transitions. [2022-02-11 00:39:29,051 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5302 transitions. Word has length 23 [2022-02-11 00:39:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:29,051 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 5302 transitions. [2022-02-11 00:39:29,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5302 transitions. [2022-02-11 00:39:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:29,053 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:29,053 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:29,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:29,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-02-11 00:39:29,267 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash 958155809, now seen corresponding path program 268 times [2022-02-11 00:39:29,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:29,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978665579] [2022-02-11 00:39:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:29,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:29,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978665579] [2022-02-11 00:39:29,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978665579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:29,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935173086] [2022-02-11 00:39:29,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:39:29,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:29,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:29,345 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:29,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-11 00:39:29,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:39:29,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:29,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:29,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 188 [2022-02-11 00:39:29,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:39:29,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:29,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:39:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:29,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:30,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-02-11 00:39:30,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:30,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 247 [2022-02-11 00:39:30,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 181 [2022-02-11 00:39:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:30,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935173086] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:30,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:30,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:39:30,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113641990] [2022-02-11 00:39:30,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:30,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:39:30,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:39:30,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:39:30,628 INFO L87 Difference]: Start difference. First operand 1603 states and 5302 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:31,797 INFO L93 Difference]: Finished difference Result 2151 states and 6988 transitions. [2022-02-11 00:39:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:39:31,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:31,801 INFO L225 Difference]: With dead ends: 2151 [2022-02-11 00:39:31,801 INFO L226 Difference]: Without dead ends: 2010 [2022-02-11 00:39:31,802 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=2745, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:39:31,802 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 142 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:31,802 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 542 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1750 Invalid, 0 Unknown, 172 Unchecked, 0.5s Time] [2022-02-11 00:39:31,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-02-11 00:39:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1640. [2022-02-11 00:39:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.325198291641245) internal successors, (5450), 1639 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5450 transitions. [2022-02-11 00:39:31,824 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5450 transitions. Word has length 23 [2022-02-11 00:39:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:31,824 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 5450 transitions. [2022-02-11 00:39:31,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5450 transitions. [2022-02-11 00:39:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:31,826 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:31,826 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:31,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:32,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-02-11 00:39:32,039 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash -324990303, now seen corresponding path program 269 times [2022-02-11 00:39:32,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:32,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624545795] [2022-02-11 00:39:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:32,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:32,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:32,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624545795] [2022-02-11 00:39:32,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624545795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:32,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292170048] [2022-02-11 00:39:32,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:39:32,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:32,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:32,125 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:32,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-11 00:39:32,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:39:32,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:32,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:32,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-02-11 00:39:32,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:32,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-02-11 00:39:32,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-02-11 00:39:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:32,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:39:33,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:33,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 291 [2022-02-11 00:39:33,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 223 [2022-02-11 00:39:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:33,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292170048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:33,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:33,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:39:33,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388049920] [2022-02-11 00:39:33,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:33,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:39:33,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:33,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:39:33,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:39:33,435 INFO L87 Difference]: Start difference. First operand 1640 states and 5450 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:34,866 INFO L93 Difference]: Finished difference Result 2213 states and 7056 transitions. [2022-02-11 00:39:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:39:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:34,870 INFO L225 Difference]: With dead ends: 2213 [2022-02-11 00:39:34,870 INFO L226 Difference]: Without dead ends: 2113 [2022-02-11 00:39:34,871 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=3348, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:39:34,871 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 180 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:34,871 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 610 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1356 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-02-11 00:39:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2022-02-11 00:39:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1634. [2022-02-11 00:39:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.333741579914268) internal successors, (5444), 1633 states have internal predecessors, (5444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5444 transitions. [2022-02-11 00:39:34,907 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5444 transitions. Word has length 23 [2022-02-11 00:39:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:34,907 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 5444 transitions. [2022-02-11 00:39:34,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5444 transitions. [2022-02-11 00:39:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:34,909 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:34,909 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:34,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-02-11 00:39:35,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:35,123 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2032399295, now seen corresponding path program 270 times [2022-02-11 00:39:35,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:35,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697477680] [2022-02-11 00:39:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:35,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:35,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:35,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697477680] [2022-02-11 00:39:35,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697477680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:35,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125691381] [2022-02-11 00:39:35,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:35,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:35,219 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:35,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-11 00:39:35,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:39:35,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:39:35,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:35,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 150 [2022-02-11 00:39:35,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 155 [2022-02-11 00:39:35,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:39:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:36,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:36,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-11 00:39:36,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:36,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 265 [2022-02-11 00:39:36,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 198 [2022-02-11 00:39:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:36,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125691381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:36,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:36,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-02-11 00:39:36,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403243681] [2022-02-11 00:39:36,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:36,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:39:36,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:36,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:39:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:36,933 INFO L87 Difference]: Start difference. First operand 1634 states and 5444 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:38,906 INFO L93 Difference]: Finished difference Result 3257 states and 10137 transitions. [2022-02-11 00:39:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:39:38,906 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:38,912 INFO L225 Difference]: With dead ends: 3257 [2022-02-11 00:39:38,912 INFO L226 Difference]: Without dead ends: 2911 [2022-02-11 00:39:38,913 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=3643, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:39:38,913 INFO L934 BasicCegarLoop]: 70 mSDtfsCounter, 212 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 3978 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:38,913 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1141 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3978 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:39:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2022-02-11 00:39:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1683. [2022-02-11 00:39:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3644470868014267) internal successors, (5659), 1682 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5659 transitions. [2022-02-11 00:39:38,941 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5659 transitions. Word has length 23 [2022-02-11 00:39:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:38,941 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5659 transitions. [2022-02-11 00:39:38,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5659 transitions. [2022-02-11 00:39:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:38,944 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:38,944 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:38,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:39,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-02-11 00:39:39,168 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:39,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1130084337, now seen corresponding path program 271 times [2022-02-11 00:39:39,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:39,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052112198] [2022-02-11 00:39:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:39,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:39,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:39,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052112198] [2022-02-11 00:39:39,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052112198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:39,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497197691] [2022-02-11 00:39:39,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:39:39,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:39,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:39,246 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:39,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-11 00:39:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:39,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:39:40,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:40,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 272 [2022-02-11 00:39:40,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 222 [2022-02-11 00:39:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:40,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:40,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 280 [2022-02-11 00:39:40,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 249 [2022-02-11 00:39:40,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:40,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 222 [2022-02-11 00:39:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:40,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497197691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:40,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:40,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-11 00:39:40,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232220122] [2022-02-11 00:39:40,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:40,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:39:40,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:39:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:40,914 INFO L87 Difference]: Start difference. First operand 1683 states and 5659 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:41,990 INFO L93 Difference]: Finished difference Result 2540 states and 8128 transitions. [2022-02-11 00:39:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:39:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:41,995 INFO L225 Difference]: With dead ends: 2540 [2022-02-11 00:39:41,995 INFO L226 Difference]: Without dead ends: 2310 [2022-02-11 00:39:41,995 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=2674, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:39:41,995 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 197 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:41,995 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 677 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1717 Invalid, 0 Unknown, 403 Unchecked, 0.5s Time] [2022-02-11 00:39:41,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-02-11 00:39:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1687. [2022-02-11 00:39:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.3499406880189797) internal successors, (5648), 1686 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5648 transitions. [2022-02-11 00:39:42,019 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5648 transitions. Word has length 23 [2022-02-11 00:39:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:42,019 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 5648 transitions. [2022-02-11 00:39:42,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5648 transitions. [2022-02-11 00:39:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:42,021 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:42,021 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:42,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-02-11 00:39:42,235 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash -368810315, now seen corresponding path program 272 times [2022-02-11 00:39:42,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:42,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410063748] [2022-02-11 00:39:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:42,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:42,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410063748] [2022-02-11 00:39:42,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410063748] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:42,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632900601] [2022-02-11 00:39:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:39:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:42,355 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:42,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-11 00:39:42,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:42,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:42,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:39:42,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 227 [2022-02-11 00:39:42,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:42,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 228 [2022-02-11 00:39:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:43,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:43,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 196 [2022-02-11 00:39:43,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:43,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 232 [2022-02-11 00:39:43,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2022-02-11 00:39:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:43,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632900601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:43,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:43,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-02-11 00:39:43,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165853064] [2022-02-11 00:39:43,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:43,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:39:43,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:43,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:39:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:39:43,959 INFO L87 Difference]: Start difference. First operand 1687 states and 5648 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:44,526 INFO L93 Difference]: Finished difference Result 2724 states and 8989 transitions. [2022-02-11 00:39:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:39:44,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:44,532 INFO L225 Difference]: With dead ends: 2724 [2022-02-11 00:39:44,532 INFO L226 Difference]: Without dead ends: 2600 [2022-02-11 00:39:44,532 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:39:44,532 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 189 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:44,532 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 315 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1048 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-02-11 00:39:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2022-02-11 00:39:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1832. [2022-02-11 00:39:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.442381212452212) internal successors, (6303), 1831 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6303 transitions. [2022-02-11 00:39:44,559 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6303 transitions. Word has length 23 [2022-02-11 00:39:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:44,559 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 6303 transitions. [2022-02-11 00:39:44,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:44,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6303 transitions. [2022-02-11 00:39:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:44,562 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:44,562 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:44,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:44,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:44,770 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash -960967623, now seen corresponding path program 273 times [2022-02-11 00:39:44,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:44,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601276749] [2022-02-11 00:39:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:44,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:44,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:44,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601276749] [2022-02-11 00:39:44,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601276749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:44,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983378216] [2022-02-11 00:39:44,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:39:44,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:44,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:44,958 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:44,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-11 00:39:45,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:39:45,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:45,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:39:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:45,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:39:45,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:45,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-02-11 00:39:45,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 143 [2022-02-11 00:39:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:45,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:46,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 276 [2022-02-11 00:39:46,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:39:46,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:46,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 146 [2022-02-11 00:39:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:46,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983378216] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:46,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:46,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:39:46,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503102540] [2022-02-11 00:39:46,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:46,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:39:46,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:46,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:39:46,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:39:46,893 INFO L87 Difference]: Start difference. First operand 1832 states and 6303 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:49,118 INFO L93 Difference]: Finished difference Result 4195 states and 12886 transitions. [2022-02-11 00:39:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:39:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:49,125 INFO L225 Difference]: With dead ends: 4195 [2022-02-11 00:39:49,125 INFO L226 Difference]: Without dead ends: 3983 [2022-02-11 00:39:49,126 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=551, Invalid=3739, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:39:49,126 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 502 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:49,126 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 624 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1997 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:39:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-02-11 00:39:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 1868. [2022-02-11 00:39:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.468130690948045) internal successors, (6475), 1867 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6475 transitions. [2022-02-11 00:39:49,161 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6475 transitions. Word has length 23 [2022-02-11 00:39:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:49,161 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 6475 transitions. [2022-02-11 00:39:49,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6475 transitions. [2022-02-11 00:39:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:49,163 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:49,163 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:49,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:49,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:49,380 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1003705529, now seen corresponding path program 274 times [2022-02-11 00:39:49,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:49,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40634887] [2022-02-11 00:39:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:49,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:49,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:49,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40634887] [2022-02-11 00:39:49,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40634887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:49,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818467814] [2022-02-11 00:39:49,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:39:49,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:49,507 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:49,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-11 00:39:49,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:39:49,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:49,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:49,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:49,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:39:50,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:50,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 286 [2022-02-11 00:39:50,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 238 [2022-02-11 00:39:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:50,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:50,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 263 [2022-02-11 00:39:51,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:39:51,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:51,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 140 [2022-02-11 00:39:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:51,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818467814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:51,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:51,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-02-11 00:39:51,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494227818] [2022-02-11 00:39:51,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:51,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:39:51,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:39:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:39:51,328 INFO L87 Difference]: Start difference. First operand 1868 states and 6475 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:51,997 INFO L93 Difference]: Finished difference Result 2783 states and 9075 transitions. [2022-02-11 00:39:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:39:51,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:52,002 INFO L225 Difference]: With dead ends: 2783 [2022-02-11 00:39:52,002 INFO L226 Difference]: Without dead ends: 2663 [2022-02-11 00:39:52,002 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:39:52,002 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 146 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:52,002 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 301 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:39:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-02-11 00:39:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1910. [2022-02-11 00:39:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.471974855945521) internal successors, (6628), 1909 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6628 transitions. [2022-02-11 00:39:52,031 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6628 transitions. Word has length 23 [2022-02-11 00:39:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:52,031 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 6628 transitions. [2022-02-11 00:39:52,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6628 transitions. [2022-02-11 00:39:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:52,034 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:52,034 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:52,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:52,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-02-11 00:39:52,247 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1976313859, now seen corresponding path program 275 times [2022-02-11 00:39:52,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:52,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194410179] [2022-02-11 00:39:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:52,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:52,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:52,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194410179] [2022-02-11 00:39:52,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194410179] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:52,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015410590] [2022-02-11 00:39:52,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:39:52,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:52,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:52,324 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:52,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-11 00:39:52,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:52,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:52,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-02-11 00:39:53,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:39:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:53,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:39:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:53,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:53,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 235 [2022-02-11 00:39:53,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-02-11 00:39:53,776 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:39:53,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 132 [2022-02-11 00:39:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:53,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015410590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:53,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:53,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:39:53,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136464005] [2022-02-11 00:39:53,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:53,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:39:53,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:39:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:39:53,908 INFO L87 Difference]: Start difference. First operand 1910 states and 6628 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:54,613 INFO L93 Difference]: Finished difference Result 2776 states and 9171 transitions. [2022-02-11 00:39:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:39:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:54,617 INFO L225 Difference]: With dead ends: 2776 [2022-02-11 00:39:54,617 INFO L226 Difference]: Without dead ends: 2593 [2022-02-11 00:39:54,617 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:39:54,618 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:54,618 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 525 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1009 Invalid, 0 Unknown, 644 Unchecked, 0.3s Time] [2022-02-11 00:39:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-02-11 00:39:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 1899. [2022-02-11 00:39:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.464172813487882) internal successors, (6575), 1898 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 6575 transitions. [2022-02-11 00:39:54,643 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 6575 transitions. Word has length 23 [2022-02-11 00:39:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:54,643 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 6575 transitions. [2022-02-11 00:39:54,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 6575 transitions. [2022-02-11 00:39:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:54,646 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:54,646 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:54,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:54,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:54,859 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2127127851, now seen corresponding path program 276 times [2022-02-11 00:39:54,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:54,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944427310] [2022-02-11 00:39:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:54,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:54,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:54,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944427310] [2022-02-11 00:39:54,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944427310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:54,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414319170] [2022-02-11 00:39:54,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:54,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:54,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:54,948 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:54,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-11 00:39:55,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:39:55,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:39:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:55,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 197 [2022-02-11 00:39:55,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:55,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 161 [2022-02-11 00:39:55,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:39:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:55,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:55,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:39:56,328 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:39:56,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 224 [2022-02-11 00:39:56,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2022-02-11 00:39:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:56,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414319170] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:56,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:56,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-02-11 00:39:56,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883017240] [2022-02-11 00:39:56,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:56,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:39:56,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:39:56,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:56,459 INFO L87 Difference]: Start difference. First operand 1899 states and 6575 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:56,864 INFO L93 Difference]: Finished difference Result 2643 states and 8910 transitions. [2022-02-11 00:39:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:39:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:56,868 INFO L225 Difference]: With dead ends: 2643 [2022-02-11 00:39:56,868 INFO L226 Difference]: Without dead ends: 2626 [2022-02-11 00:39:56,868 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:39:56,868 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 173 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:56,868 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 355 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 613 Invalid, 0 Unknown, 592 Unchecked, 0.2s Time] [2022-02-11 00:39:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2022-02-11 00:39:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1897. [2022-02-11 00:39:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.4593881856540083) internal successors, (6559), 1896 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6559 transitions. [2022-02-11 00:39:56,892 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6559 transitions. Word has length 23 [2022-02-11 00:39:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:56,892 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 6559 transitions. [2022-02-11 00:39:56,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6559 transitions. [2022-02-11 00:39:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:56,895 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:56,895 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:56,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:57,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:57,112 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1844290479, now seen corresponding path program 277 times [2022-02-11 00:39:57,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:57,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071614933] [2022-02-11 00:39:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:57,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:57,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:57,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071614933] [2022-02-11 00:39:57,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071614933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:57,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707946604] [2022-02-11 00:39:57,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:39:57,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:57,191 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:57,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-11 00:39:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:57,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:57,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:57,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-02-11 00:39:57,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-02-11 00:39:57,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:57,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-02-11 00:39:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:58,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:58,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 259 [2022-02-11 00:39:58,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-11 00:39:58,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:58,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 200 [2022-02-11 00:39:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:39:58,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707946604] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:58,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:58,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:39:58,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576015228] [2022-02-11 00:39:58,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:58,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:39:58,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:58,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:39:58,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:39:58,851 INFO L87 Difference]: Start difference. First operand 1897 states and 6559 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:58,992 INFO L93 Difference]: Finished difference Result 2139 states and 7223 transitions. [2022-02-11 00:39:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-11 00:39:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:39:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:58,995 INFO L225 Difference]: With dead ends: 2139 [2022-02-11 00:39:58,995 INFO L226 Difference]: Without dead ends: 2079 [2022-02-11 00:39:58,995 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:39:58,995 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:58,995 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 229 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 511 Invalid, 0 Unknown, 328 Unchecked, 0.1s Time] [2022-02-11 00:39:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-02-11 00:39:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1879. [2022-02-11 00:39:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4696485623003195) internal successors, (6516), 1878 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6516 transitions. [2022-02-11 00:39:59,016 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6516 transitions. Word has length 23 [2022-02-11 00:39:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:59,016 INFO L470 AbstractCegarLoop]: Abstraction has 1879 states and 6516 transitions. [2022-02-11 00:39:59,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6516 transitions. [2022-02-11 00:39:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:39:59,019 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:59,019 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:59,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:59,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:59,235 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:39:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1633248171, now seen corresponding path program 278 times [2022-02-11 00:39:59,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:59,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005464966] [2022-02-11 00:39:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:59,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:39:59,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:59,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005464966] [2022-02-11 00:39:59,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005464966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:59,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564736175] [2022-02-11 00:39:59,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:39:59,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:59,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:59,424 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:59,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-11 00:39:59,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:59,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:59,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:39:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:59,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-02-11 00:40:00,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:40:00,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:00,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 134 [2022-02-11 00:40:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:00,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:00,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:40:01,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 266 [2022-02-11 00:40:01,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:01,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 249 [2022-02-11 00:40:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:01,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564736175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:01,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:01,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:40:01,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475493529] [2022-02-11 00:40:01,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:01,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:40:01,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:01,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:40:01,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:40:01,313 INFO L87 Difference]: Start difference. First operand 1879 states and 6516 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:02,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:02,226 INFO L93 Difference]: Finished difference Result 2988 states and 9860 transitions. [2022-02-11 00:40:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-11 00:40:02,226 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:02,231 INFO L225 Difference]: With dead ends: 2988 [2022-02-11 00:40:02,231 INFO L226 Difference]: Without dead ends: 2755 [2022-02-11 00:40:02,232 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:40:02,232 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 259 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:02,232 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 417 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1195 Invalid, 0 Unknown, 205 Unchecked, 0.4s Time] [2022-02-11 00:40:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-02-11 00:40:02,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1980. [2022-02-11 00:40:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.5073269327943404) internal successors, (6941), 1979 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6941 transitions. [2022-02-11 00:40:02,259 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6941 transitions. Word has length 23 [2022-02-11 00:40:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:02,259 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6941 transitions. [2022-02-11 00:40:02,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6941 transitions. [2022-02-11 00:40:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:02,261 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:02,261 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:02,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-02-11 00:40:02,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2022-02-11 00:40:02,478 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:02,479 INFO L85 PathProgramCache]: Analyzing trace with hash -216166955, now seen corresponding path program 279 times [2022-02-11 00:40:02,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:02,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133055811] [2022-02-11 00:40:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:02,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:02,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:02,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133055811] [2022-02-11 00:40:02,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133055811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:02,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435497917] [2022-02-11 00:40:02,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:40:02,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:02,608 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:02,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-11 00:40:02,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:40:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:02,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:02,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-02-11 00:40:03,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:40:03,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:03,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:40:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:03,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:03,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:40:03,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-02-11 00:40:03,837 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:40:03,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 239 [2022-02-11 00:40:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:03,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435497917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:03,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:03,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-11 00:40:03,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618383376] [2022-02-11 00:40:03,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:03,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:40:03,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:40:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:40:03,958 INFO L87 Difference]: Start difference. First operand 1980 states and 6941 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:04,849 INFO L93 Difference]: Finished difference Result 2696 states and 9229 transitions. [2022-02-11 00:40:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:40:04,849 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:04,853 INFO L225 Difference]: With dead ends: 2696 [2022-02-11 00:40:04,853 INFO L226 Difference]: Without dead ends: 2598 [2022-02-11 00:40:04,854 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=2241, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:40:04,854 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:04,854 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 598 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1278 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2022-02-11 00:40:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2022-02-11 00:40:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2008. [2022-02-11 00:40:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5226706527154956) internal successors, (7070), 2007 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7070 transitions. [2022-02-11 00:40:04,883 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7070 transitions. Word has length 23 [2022-02-11 00:40:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:04,883 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7070 transitions. [2022-02-11 00:40:04,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7070 transitions. [2022-02-11 00:40:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:04,886 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:04,886 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:04,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:05,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:05,100 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2141222643, now seen corresponding path program 280 times [2022-02-11 00:40:05,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:05,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981738210] [2022-02-11 00:40:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:05,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:05,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981738210] [2022-02-11 00:40:05,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981738210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:05,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079801319] [2022-02-11 00:40:05,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:40:05,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:05,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:05,263 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:05,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-11 00:40:05,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:40:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:05,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-02-11 00:40:05,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:05,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 240 [2022-02-11 00:40:05,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 208 [2022-02-11 00:40:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:06,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:06,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:40:06,762 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:40:06,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 267 [2022-02-11 00:40:06,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 221 [2022-02-11 00:40:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:06,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079801319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:06,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:06,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:40:06,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167748590] [2022-02-11 00:40:06,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:40:06,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:40:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:40:06,885 INFO L87 Difference]: Start difference. First operand 2008 states and 7070 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:07,475 INFO L93 Difference]: Finished difference Result 2805 states and 9744 transitions. [2022-02-11 00:40:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:40:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:07,482 INFO L225 Difference]: With dead ends: 2805 [2022-02-11 00:40:07,482 INFO L226 Difference]: Without dead ends: 2757 [2022-02-11 00:40:07,482 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:40:07,482 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 203 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:07,482 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 308 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 501 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-02-11 00:40:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2022-02-11 00:40:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2008. [2022-02-11 00:40:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.521674140508221) internal successors, (7068), 2007 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7068 transitions. [2022-02-11 00:40:07,516 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7068 transitions. Word has length 23 [2022-02-11 00:40:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:07,517 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7068 transitions. [2022-02-11 00:40:07,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7068 transitions. [2022-02-11 00:40:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:07,520 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:07,520 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:07,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:07,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-02-11 00:40:07,735 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash -997922667, now seen corresponding path program 281 times [2022-02-11 00:40:07,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:07,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643850210] [2022-02-11 00:40:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:07,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:07,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643850210] [2022-02-11 00:40:07,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643850210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:07,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686087755] [2022-02-11 00:40:07,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:40:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:07,839 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:07,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-11 00:40:08,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:40:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:08,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-02-11 00:40:08,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:08,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 199 [2022-02-11 00:40:08,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 157 [2022-02-11 00:40:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:08,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:09,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-02-11 00:40:09,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:40:09,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:09,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 214 [2022-02-11 00:40:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:09,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686087755] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:09,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:09,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:40:09,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825639739] [2022-02-11 00:40:09,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:09,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:40:09,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:09,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:40:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:40:09,530 INFO L87 Difference]: Start difference. First operand 2008 states and 7068 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:10,028 INFO L93 Difference]: Finished difference Result 2669 states and 8887 transitions. [2022-02-11 00:40:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:40:10,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:10,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:10,033 INFO L225 Difference]: With dead ends: 2669 [2022-02-11 00:40:10,033 INFO L226 Difference]: Without dead ends: 2518 [2022-02-11 00:40:10,033 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:40:10,033 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 205 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:10,033 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 340 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 863 Invalid, 0 Unknown, 334 Unchecked, 0.3s Time] [2022-02-11 00:40:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-02-11 00:40:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2050. [2022-02-11 00:40:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 3.5285505124450953) internal successors, (7230), 2049 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 7230 transitions. [2022-02-11 00:40:10,060 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 7230 transitions. Word has length 23 [2022-02-11 00:40:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:10,060 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 7230 transitions. [2022-02-11 00:40:10,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 7230 transitions. [2022-02-11 00:40:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:10,062 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:10,063 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:10,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:10,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-02-11 00:40:10,275 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash 118855181, now seen corresponding path program 282 times [2022-02-11 00:40:10,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:10,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762586886] [2022-02-11 00:40:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:10,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:10,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:10,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762586886] [2022-02-11 00:40:10,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762586886] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:10,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249590141] [2022-02-11 00:40:10,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:40:10,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:10,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:10,409 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:10,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-11 00:40:10,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:40:10,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:10,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:40:11,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:11,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 244 [2022-02-11 00:40:11,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 190 [2022-02-11 00:40:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:11,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:11,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-02-11 00:40:12,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 239 [2022-02-11 00:40:12,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:12,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 222 [2022-02-11 00:40:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:12,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249590141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:12,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:12,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:40:12,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126910353] [2022-02-11 00:40:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:12,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:40:12,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:40:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:40:12,491 INFO L87 Difference]: Start difference. First operand 2050 states and 7230 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:12,774 INFO L93 Difference]: Finished difference Result 2426 states and 8274 transitions. [2022-02-11 00:40:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:40:12,774 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:12,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:12,777 INFO L225 Difference]: With dead ends: 2426 [2022-02-11 00:40:12,777 INFO L226 Difference]: Without dead ends: 2315 [2022-02-11 00:40:12,778 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:40:12,778 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:12,778 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 301 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-02-11 00:40:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-11 00:40:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2088. [2022-02-11 00:40:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 3.5232390991854334) internal successors, (7353), 2087 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 7353 transitions. [2022-02-11 00:40:12,805 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 7353 transitions. Word has length 23 [2022-02-11 00:40:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:12,806 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 7353 transitions. [2022-02-11 00:40:12,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 7353 transitions. [2022-02-11 00:40:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:12,809 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:12,809 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:12,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:13,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-02-11 00:40:13,023 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash -799442709, now seen corresponding path program 283 times [2022-02-11 00:40:13,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:13,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437885056] [2022-02-11 00:40:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:13,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:13,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:13,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437885056] [2022-02-11 00:40:13,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437885056] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:13,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19627475] [2022-02-11 00:40:13,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:40:13,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:13,228 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:13,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-11 00:40:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:13,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:13,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:13,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 183 [2022-02-11 00:40:13,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:40:13,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:13,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:40:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:13,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:14,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:40:14,479 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:40:14,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 284 [2022-02-11 00:40:14,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 230 [2022-02-11 00:40:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:14,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19627475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:14,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:14,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:40:14,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736840779] [2022-02-11 00:40:14,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:14,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:40:14,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:40:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:40:14,598 INFO L87 Difference]: Start difference. First operand 2088 states and 7353 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:15,516 INFO L93 Difference]: Finished difference Result 2956 states and 10025 transitions. [2022-02-11 00:40:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:40:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:15,521 INFO L225 Difference]: With dead ends: 2956 [2022-02-11 00:40:15,521 INFO L226 Difference]: Without dead ends: 2852 [2022-02-11 00:40:15,521 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:40:15,522 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 143 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:15,522 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 698 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1083 Invalid, 0 Unknown, 321 Unchecked, 0.4s Time] [2022-02-11 00:40:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2022-02-11 00:40:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2156. [2022-02-11 00:40:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.520185614849188) internal successors, (7586), 2155 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7586 transitions. [2022-02-11 00:40:15,549 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7586 transitions. Word has length 23 [2022-02-11 00:40:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:15,549 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 7586 transitions. [2022-02-11 00:40:15,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7586 transitions. [2022-02-11 00:40:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:15,552 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:15,552 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:15,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-02-11 00:40:15,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-02-11 00:40:15,769 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1951278285, now seen corresponding path program 284 times [2022-02-11 00:40:15,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:15,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816520114] [2022-02-11 00:40:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:15,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:15,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816520114] [2022-02-11 00:40:15,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816520114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:15,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389401] [2022-02-11 00:40:15,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:40:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:15,903 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:15,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-11 00:40:16,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:40:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:16,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-02-11 00:40:16,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:16,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 180 [2022-02-11 00:40:16,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-02-11 00:40:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:17,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:17,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 194 [2022-02-11 00:40:17,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-02-11 00:40:17,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:17,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 192 [2022-02-11 00:40:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:17,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:17,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:17,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:40:17,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383641702] [2022-02-11 00:40:17,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:17,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:40:17,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:40:17,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:40:17,944 INFO L87 Difference]: Start difference. First operand 2156 states and 7586 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:20,873 INFO L93 Difference]: Finished difference Result 3932 states and 12821 transitions. [2022-02-11 00:40:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:40:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:20,880 INFO L225 Difference]: With dead ends: 3932 [2022-02-11 00:40:20,880 INFO L226 Difference]: Without dead ends: 3627 [2022-02-11 00:40:20,881 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=566, Invalid=5286, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:40:20,881 INFO L934 BasicCegarLoop]: 75 mSDtfsCounter, 311 mSDsluCounter, 2622 mSDsCounter, 0 mSdLazyCounter, 3669 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:20,881 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1188 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3669 Invalid, 0 Unknown, 183 Unchecked, 1.1s Time] [2022-02-11 00:40:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-02-11 00:40:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1818. [2022-02-11 00:40:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.7171161254815632) internal successors, (6754), 1817 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6754 transitions. [2022-02-11 00:40:20,912 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6754 transitions. Word has length 23 [2022-02-11 00:40:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:20,913 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6754 transitions. [2022-02-11 00:40:20,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6754 transitions. [2022-02-11 00:40:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:20,915 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:20,915 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:20,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:21,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-02-11 00:40:21,132 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1919523695, now seen corresponding path program 285 times [2022-02-11 00:40:21,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:21,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481665994] [2022-02-11 00:40:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:21,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:21,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481665994] [2022-02-11 00:40:21,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481665994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:21,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305177293] [2022-02-11 00:40:21,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:40:21,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:21,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:21,267 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-11 00:40:21,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:40:21,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:21,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 188 [2022-02-11 00:40:22,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 286 [2022-02-11 00:40:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:22,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 264 [2022-02-11 00:40:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:22,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:22,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-02-11 00:40:22,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:22,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 292 [2022-02-11 00:40:22,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 221 [2022-02-11 00:40:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:40:23,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305177293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:23,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:23,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:40:23,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131276146] [2022-02-11 00:40:23,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:40:23,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:23,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:40:23,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:40:23,075 INFO L87 Difference]: Start difference. First operand 1818 states and 6754 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:26,835 INFO L93 Difference]: Finished difference Result 3624 states and 12109 transitions. [2022-02-11 00:40:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-11 00:40:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:26,841 INFO L225 Difference]: With dead ends: 3624 [2022-02-11 00:40:26,841 INFO L226 Difference]: Without dead ends: 3253 [2022-02-11 00:40:26,841 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3987 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1219, Invalid=10771, Unknown=0, NotChecked=0, Total=11990 [2022-02-11 00:40:26,842 INFO L934 BasicCegarLoop]: 81 mSDtfsCounter, 417 mSDsluCounter, 2488 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 3642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:26,842 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1316 Invalid, 3642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3092 Invalid, 0 Unknown, 356 Unchecked, 1.0s Time] [2022-02-11 00:40:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2022-02-11 00:40:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 2004. [2022-02-11 00:40:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.7219171243135296) internal successors, (7455), 2003 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7455 transitions. [2022-02-11 00:40:26,873 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7455 transitions. Word has length 23 [2022-02-11 00:40:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:26,874 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 7455 transitions. [2022-02-11 00:40:26,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7455 transitions. [2022-02-11 00:40:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:26,876 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:26,876 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:26,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-02-11 00:40:27,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-02-11 00:40:27,083 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 160947901, now seen corresponding path program 286 times [2022-02-11 00:40:27,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:27,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450536045] [2022-02-11 00:40:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:27,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:27,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450536045] [2022-02-11 00:40:27,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450536045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:27,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000350471] [2022-02-11 00:40:27,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:40:27,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:27,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:27,187 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:27,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-11 00:40:27,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:40:27,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:40:27,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:27,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 251 [2022-02-11 00:40:27,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-02-11 00:40:27,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:27,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 180 [2022-02-11 00:40:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:28,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:28,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 277 [2022-02-11 00:40:28,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:40:28,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:28,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 164 [2022-02-11 00:40:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:28,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000350471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:28,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:28,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:40:28,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407510057] [2022-02-11 00:40:28,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:28,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:40:28,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:40:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:40:28,836 INFO L87 Difference]: Start difference. First operand 2004 states and 7455 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:29,355 INFO L93 Difference]: Finished difference Result 2738 states and 9602 transitions. [2022-02-11 00:40:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:40:29,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:29,360 INFO L225 Difference]: With dead ends: 2738 [2022-02-11 00:40:29,360 INFO L226 Difference]: Without dead ends: 2605 [2022-02-11 00:40:29,360 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:40:29,361 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:29,361 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 341 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:40:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-02-11 00:40:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1987. [2022-02-11 00:40:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.727593152064451) internal successors, (7403), 1986 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 7403 transitions. [2022-02-11 00:40:29,387 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 7403 transitions. Word has length 23 [2022-02-11 00:40:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:29,388 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 7403 transitions. [2022-02-11 00:40:29,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 7403 transitions. [2022-02-11 00:40:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:29,390 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:29,390 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:29,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:29,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-02-11 00:40:29,607 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1108816465, now seen corresponding path program 287 times [2022-02-11 00:40:29,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:29,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900766880] [2022-02-11 00:40:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:29,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:29,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900766880] [2022-02-11 00:40:29,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900766880] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:29,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032043761] [2022-02-11 00:40:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:40:29,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:29,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:29,809 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:29,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-11 00:40:30,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:40:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:40:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:30,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 196 [2022-02-11 00:40:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:30,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 164 [2022-02-11 00:40:30,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:40:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:30,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:30,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-02-11 00:40:31,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:40:31,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:31,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 143 [2022-02-11 00:40:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:31,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032043761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:31,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:31,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-11 00:40:31,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720371813] [2022-02-11 00:40:31,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:31,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:40:31,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:40:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:40:31,296 INFO L87 Difference]: Start difference. First operand 1987 states and 7403 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:32,723 INFO L93 Difference]: Finished difference Result 3578 states and 12230 transitions. [2022-02-11 00:40:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:40:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:32,730 INFO L225 Difference]: With dead ends: 3578 [2022-02-11 00:40:32,730 INFO L226 Difference]: Without dead ends: 3330 [2022-02-11 00:40:32,730 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=2481, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:40:32,730 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 303 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:32,730 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 511 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:40:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-02-11 00:40:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2089. [2022-02-11 00:40:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.7863984674329503) internal successors, (7906), 2088 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7906 transitions. [2022-02-11 00:40:32,764 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7906 transitions. Word has length 23 [2022-02-11 00:40:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:32,764 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 7906 transitions. [2022-02-11 00:40:32,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7906 transitions. [2022-02-11 00:40:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:32,767 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:32,767 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:32,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:32,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:32,985 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1863026185, now seen corresponding path program 288 times [2022-02-11 00:40:32,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:32,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883851561] [2022-02-11 00:40:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:32,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:33,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:33,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883851561] [2022-02-11 00:40:33,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883851561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:33,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46693255] [2022-02-11 00:40:33,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:40:33,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:33,224 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:33,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-11 00:40:33,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:40:33,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:33,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-02-11 00:40:33,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:40:33,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:33,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:40:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:34,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-02-11 00:40:34,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:34,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 177 [2022-02-11 00:40:34,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:40:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:34,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46693255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:34,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:34,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:40:34,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932267362] [2022-02-11 00:40:34,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:34,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:40:34,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:40:34,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:40:34,700 INFO L87 Difference]: Start difference. First operand 2089 states and 7906 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:37,465 INFO L93 Difference]: Finished difference Result 3595 states and 12374 transitions. [2022-02-11 00:40:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 00:40:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:37,472 INFO L225 Difference]: With dead ends: 3595 [2022-02-11 00:40:37,472 INFO L226 Difference]: Without dead ends: 3426 [2022-02-11 00:40:37,473 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=816, Invalid=6324, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 00:40:37,473 INFO L934 BasicCegarLoop]: 71 mSDtfsCounter, 355 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:37,473 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1158 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3206 Invalid, 0 Unknown, 272 Unchecked, 1.0s Time] [2022-02-11 00:40:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2022-02-11 00:40:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 2156. [2022-02-11 00:40:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.810672853828306) internal successors, (8212), 2155 states have internal predecessors, (8212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 8212 transitions. [2022-02-11 00:40:37,507 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 8212 transitions. Word has length 23 [2022-02-11 00:40:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:37,508 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 8212 transitions. [2022-02-11 00:40:37,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 8212 transitions. [2022-02-11 00:40:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:37,511 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:37,511 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:37,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:37,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2022-02-11 00:40:37,728 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1304107393, now seen corresponding path program 289 times [2022-02-11 00:40:37,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:37,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935936398] [2022-02-11 00:40:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:37,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:37,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935936398] [2022-02-11 00:40:37,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935936398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:37,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442771229] [2022-02-11 00:40:37,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:40:37,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:37,864 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:37,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-11 00:40:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:38,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:38,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:40:38,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:40:38,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:38,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:40:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:38,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:38,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:40:39,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 390 treesize of output 330 [2022-02-11 00:40:39,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:39,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 307 [2022-02-11 00:40:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:39,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442771229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:39,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:39,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:40:39,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979523277] [2022-02-11 00:40:39,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:39,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:40:39,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:40:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:40:39,601 INFO L87 Difference]: Start difference. First operand 2156 states and 8212 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:43,123 INFO L93 Difference]: Finished difference Result 4203 states and 14028 transitions. [2022-02-11 00:40:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-11 00:40:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:43,131 INFO L225 Difference]: With dead ends: 4203 [2022-02-11 00:40:43,131 INFO L226 Difference]: Without dead ends: 3828 [2022-02-11 00:40:43,131 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=768, Invalid=7242, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 00:40:43,131 INFO L934 BasicCegarLoop]: 75 mSDtfsCounter, 377 mSDsluCounter, 2383 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:43,132 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1292 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2723 Invalid, 0 Unknown, 664 Unchecked, 1.0s Time] [2022-02-11 00:40:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2022-02-11 00:40:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2155. [2022-02-11 00:40:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.7920148560817086) internal successors, (8168), 2154 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 8168 transitions. [2022-02-11 00:40:43,171 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 8168 transitions. Word has length 23 [2022-02-11 00:40:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:43,171 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 8168 transitions. [2022-02-11 00:40:43,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 8168 transitions. [2022-02-11 00:40:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:43,174 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:43,175 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:43,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-11 00:40:43,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:43,391 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 874469363, now seen corresponding path program 290 times [2022-02-11 00:40:43,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:43,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282967790] [2022-02-11 00:40:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:43,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:43,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282967790] [2022-02-11 00:40:43,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282967790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:43,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642933638] [2022-02-11 00:40:43,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:40:43,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:43,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:43,471 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:43,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-11 00:40:43,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:40:43,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:43,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:43,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:43,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:40:44,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 227 [2022-02-11 00:40:44,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:44,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 213 [2022-02-11 00:40:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:44,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:44,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:40:44,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 285 [2022-02-11 00:40:44,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:44,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 262 [2022-02-11 00:40:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:45,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642933638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:45,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:45,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:40:45,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266961396] [2022-02-11 00:40:45,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:45,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:40:45,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:40:45,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:40:45,141 INFO L87 Difference]: Start difference. First operand 2155 states and 8168 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:46,574 INFO L93 Difference]: Finished difference Result 3478 states and 11927 transitions. [2022-02-11 00:40:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 00:40:46,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:46,581 INFO L225 Difference]: With dead ends: 3478 [2022-02-11 00:40:46,581 INFO L226 Difference]: Without dead ends: 3288 [2022-02-11 00:40:46,581 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=3931, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:40:46,581 INFO L934 BasicCegarLoop]: 70 mSDtfsCounter, 205 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:46,582 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1077 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2690 Invalid, 0 Unknown, 407 Unchecked, 0.7s Time] [2022-02-11 00:40:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-02-11 00:40:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2082. [2022-02-11 00:40:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 3.7775108121095626) internal successors, (7861), 2081 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 7861 transitions. [2022-02-11 00:40:46,613 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 7861 transitions. Word has length 23 [2022-02-11 00:40:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:46,613 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 7861 transitions. [2022-02-11 00:40:46,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 7861 transitions. [2022-02-11 00:40:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:46,616 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:46,616 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:46,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:46,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:46,834 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash -28660117, now seen corresponding path program 291 times [2022-02-11 00:40:46,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:46,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497228499] [2022-02-11 00:40:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:46,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:46,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497228499] [2022-02-11 00:40:46,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497228499] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:46,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613820808] [2022-02-11 00:40:46,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:40:46,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:46,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:46,931 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:46,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-11 00:40:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:40:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:47,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:47,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 244 [2022-02-11 00:40:47,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:40:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:47,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:40:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:47,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:40:48,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:48,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 266 [2022-02-11 00:40:48,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 194 [2022-02-11 00:40:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:48,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613820808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:48,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:48,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:40:48,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689625654] [2022-02-11 00:40:48,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:48,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:40:48,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:48,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:40:48,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:40:48,348 INFO L87 Difference]: Start difference. First operand 2082 states and 7861 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:49,542 INFO L93 Difference]: Finished difference Result 2970 states and 10786 transitions. [2022-02-11 00:40:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:40:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:49,547 INFO L225 Difference]: With dead ends: 2970 [2022-02-11 00:40:49,547 INFO L226 Difference]: Without dead ends: 2764 [2022-02-11 00:40:49,548 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:40:49,548 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:49,548 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 564 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1797 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2022-02-11 00:40:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-02-11 00:40:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2164. [2022-02-11 00:40:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 3.8187702265372168) internal successors, (8260), 2163 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 8260 transitions. [2022-02-11 00:40:49,578 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 8260 transitions. Word has length 23 [2022-02-11 00:40:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:49,578 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 8260 transitions. [2022-02-11 00:40:49,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 8260 transitions. [2022-02-11 00:40:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:49,581 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:49,581 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:49,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:49,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-02-11 00:40:49,799 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1491034655, now seen corresponding path program 292 times [2022-02-11 00:40:49,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:49,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290404914] [2022-02-11 00:40:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:49,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:49,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290404914] [2022-02-11 00:40:49,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290404914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:49,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203567894] [2022-02-11 00:40:49,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:40:49,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:49,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:49,913 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:49,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-11 00:40:50,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:40:50,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:50,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 150 [2022-02-11 00:40:50,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:40:50,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 141 [2022-02-11 00:40:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:50,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:50,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:40:51,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:51,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 300 [2022-02-11 00:40:51,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 236 [2022-02-11 00:40:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:51,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203567894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:51,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:51,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-02-11 00:40:51,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491177284] [2022-02-11 00:40:51,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:51,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:40:51,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:51,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:40:51,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:40:51,460 INFO L87 Difference]: Start difference. First operand 2164 states and 8260 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:52,053 INFO L93 Difference]: Finished difference Result 2992 states and 10795 transitions. [2022-02-11 00:40:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:40:52,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:52,058 INFO L225 Difference]: With dead ends: 2992 [2022-02-11 00:40:52,058 INFO L226 Difference]: Without dead ends: 2845 [2022-02-11 00:40:52,059 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:40:52,059 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 189 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:52,059 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 336 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:40:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-02-11 00:40:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2215. [2022-02-11 00:40:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 3.832429990966576) internal successors, (8485), 2214 states have internal predecessors, (8485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 8485 transitions. [2022-02-11 00:40:52,090 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 8485 transitions. Word has length 23 [2022-02-11 00:40:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:52,090 INFO L470 AbstractCegarLoop]: Abstraction has 2215 states and 8485 transitions. [2022-02-11 00:40:52,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 8485 transitions. [2022-02-11 00:40:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:52,094 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:52,094 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:52,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:52,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:52,311 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1203444595, now seen corresponding path program 293 times [2022-02-11 00:40:52,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:52,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749668960] [2022-02-11 00:40:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:52,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:52,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:52,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749668960] [2022-02-11 00:40:52,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749668960] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:52,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759131428] [2022-02-11 00:40:52,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:40:52,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:52,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:52,436 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:52,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-11 00:40:52,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:40:52,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:52,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-02-11 00:40:53,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:53,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 240 [2022-02-11 00:40:53,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 180 [2022-02-11 00:40:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:53,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:53,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:40:53,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-02-11 00:40:53,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:53,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 262 [2022-02-11 00:40:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:54,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759131428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:54,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:54,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:40:54,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789620904] [2022-02-11 00:40:54,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:54,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:40:54,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:40:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:40:54,069 INFO L87 Difference]: Start difference. First operand 2215 states and 8485 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:57,133 INFO L93 Difference]: Finished difference Result 3510 states and 12421 transitions. [2022-02-11 00:40:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:40:57,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:40:57,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:57,139 INFO L225 Difference]: With dead ends: 3510 [2022-02-11 00:40:57,140 INFO L226 Difference]: Without dead ends: 3344 [2022-02-11 00:40:57,140 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=681, Invalid=5639, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:40:57,140 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 348 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:57,140 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 718 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2112 Invalid, 0 Unknown, 419 Unchecked, 0.8s Time] [2022-02-11 00:40:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-02-11 00:40:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 2288. [2022-02-11 00:40:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.8447748141670313) internal successors, (8793), 2287 states have internal predecessors, (8793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8793 transitions. [2022-02-11 00:40:57,174 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8793 transitions. Word has length 23 [2022-02-11 00:40:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:57,174 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 8793 transitions. [2022-02-11 00:40:57,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8793 transitions. [2022-02-11 00:40:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:40:57,178 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:57,178 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:57,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:57,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-02-11 00:40:57,383 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:40:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1736534693, now seen corresponding path program 294 times [2022-02-11 00:40:57,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:57,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929181273] [2022-02-11 00:40:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:40:57,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:57,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929181273] [2022-02-11 00:40:57,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929181273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:57,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960048238] [2022-02-11 00:40:57,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:40:57,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:57,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:57,472 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:57,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-11 00:40:57,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:40:57,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:40:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:57,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-02-11 00:40:58,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-02-11 00:40:58,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:58,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 174 [2022-02-11 00:40:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:58,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:58,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-02-11 00:40:58,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:40:58,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:58,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 212 [2022-02-11 00:40:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:59,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960048238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:59,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:59,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:40:59,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361958833] [2022-02-11 00:40:59,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:59,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:40:59,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:40:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:40:59,298 INFO L87 Difference]: Start difference. First operand 2288 states and 8793 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:01,814 INFO L93 Difference]: Finished difference Result 3808 states and 13029 transitions. [2022-02-11 00:41:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 00:41:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:01,821 INFO L225 Difference]: With dead ends: 3808 [2022-02-11 00:41:01,821 INFO L226 Difference]: Without dead ends: 3543 [2022-02-11 00:41:01,822 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=507, Invalid=5345, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:41:01,822 INFO L934 BasicCegarLoop]: 72 mSDtfsCounter, 319 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:01,822 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 978 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2545 Invalid, 0 Unknown, 309 Unchecked, 0.8s Time] [2022-02-11 00:41:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-02-11 00:41:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2322. [2022-02-11 00:41:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 3.838862559241706) internal successors, (8910), 2321 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 8910 transitions. [2022-02-11 00:41:01,862 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 8910 transitions. Word has length 23 [2022-02-11 00:41:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 8910 transitions. [2022-02-11 00:41:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 8910 transitions. [2022-02-11 00:41:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:01,865 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:01,865 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:01,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:02,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-11 00:41:02,081 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1384159003, now seen corresponding path program 295 times [2022-02-11 00:41:02,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:02,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441324040] [2022-02-11 00:41:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:02,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:02,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:02,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441324040] [2022-02-11 00:41:02,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441324040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:02,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246275185] [2022-02-11 00:41:02,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:41:02,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:02,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:02,161 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:02,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-11 00:41:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:41:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:02,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 242 [2022-02-11 00:41:03,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:41:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:03,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:41:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:03,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:03,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 230 [2022-02-11 00:41:03,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-02-11 00:41:03,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:03,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 213 [2022-02-11 00:41:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:03,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246275185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:03,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:03,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:41:03,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393518793] [2022-02-11 00:41:03,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:03,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:41:03,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:41:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:41:03,909 INFO L87 Difference]: Start difference. First operand 2322 states and 8910 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:06,062 INFO L93 Difference]: Finished difference Result 3899 states and 13323 transitions. [2022-02-11 00:41:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:41:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:06,069 INFO L225 Difference]: With dead ends: 3899 [2022-02-11 00:41:06,069 INFO L226 Difference]: Without dead ends: 3400 [2022-02-11 00:41:06,070 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=571, Invalid=5749, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:41:06,070 INFO L934 BasicCegarLoop]: 67 mSDtfsCounter, 241 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:06,070 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1032 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2863 Invalid, 0 Unknown, 378 Unchecked, 0.8s Time] [2022-02-11 00:41:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-02-11 00:41:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2323. [2022-02-11 00:41:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.8238587424633934) internal successors, (8879), 2322 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 8879 transitions. [2022-02-11 00:41:06,112 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 8879 transitions. Word has length 23 [2022-02-11 00:41:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:06,113 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 8879 transitions. [2022-02-11 00:41:06,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 8879 transitions. [2022-02-11 00:41:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:06,117 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:06,117 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:06,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:06,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:06,318 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash -468315819, now seen corresponding path program 296 times [2022-02-11 00:41:06,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:06,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801853178] [2022-02-11 00:41:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:06,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:06,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:06,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801853178] [2022-02-11 00:41:06,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801853178] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:06,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715490549] [2022-02-11 00:41:06,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:41:06,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:06,533 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:06,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-11 00:41:06,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:41:06,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:06,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:06,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:07,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 302 [2022-02-11 00:41:07,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-02-11 00:41:07,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:07,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-02-11 00:41:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:07,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:07,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-02-11 00:41:08,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:08,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 188 [2022-02-11 00:41:08,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:41:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:08,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715490549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:08,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:08,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-02-11 00:41:08,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746438008] [2022-02-11 00:41:08,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:08,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:41:08,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:41:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:41:08,252 INFO L87 Difference]: Start difference. First operand 2323 states and 8879 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:09,298 INFO L93 Difference]: Finished difference Result 3850 states and 13654 transitions. [2022-02-11 00:41:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:41:09,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:09,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:09,305 INFO L225 Difference]: With dead ends: 3850 [2022-02-11 00:41:09,305 INFO L226 Difference]: Without dead ends: 3636 [2022-02-11 00:41:09,305 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=2414, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:41:09,305 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 291 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:09,305 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 398 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:41:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2022-02-11 00:41:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2444. [2022-02-11 00:41:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.880474826033565) internal successors, (9480), 2443 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 9480 transitions. [2022-02-11 00:41:09,345 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 9480 transitions. Word has length 23 [2022-02-11 00:41:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:09,345 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 9480 transitions. [2022-02-11 00:41:09,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 9480 transitions. [2022-02-11 00:41:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:09,348 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:09,348 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:09,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-02-11 00:41:09,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:09,561 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:09,561 INFO L85 PathProgramCache]: Analyzing trace with hash -313878301, now seen corresponding path program 297 times [2022-02-11 00:41:09,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:09,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321133839] [2022-02-11 00:41:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:09,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:09,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321133839] [2022-02-11 00:41:09,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321133839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:09,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230429059] [2022-02-11 00:41:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:41:09,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:09,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:09,681 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:09,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-11 00:41:10,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:41:10,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:41:10,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:10,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:41:10,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:10,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-02-11 00:41:10,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-02-11 00:41:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:10,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:10,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-02-11 00:41:11,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:41:11,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:11,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 146 [2022-02-11 00:41:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:11,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230429059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:11,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:11,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:41:11,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468427419] [2022-02-11 00:41:11,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:11,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:41:11,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:41:11,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:41:11,330 INFO L87 Difference]: Start difference. First operand 2444 states and 9480 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:12,265 INFO L93 Difference]: Finished difference Result 3516 states and 12608 transitions. [2022-02-11 00:41:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 00:41:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:12,271 INFO L225 Difference]: With dead ends: 3516 [2022-02-11 00:41:12,271 INFO L226 Difference]: Without dead ends: 3296 [2022-02-11 00:41:12,271 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:41:12,272 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:12,272 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 496 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:41:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2022-02-11 00:41:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2454. [2022-02-11 00:41:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 3.8630248675091723) internal successors, (9476), 2453 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 9476 transitions. [2022-02-11 00:41:12,309 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 9476 transitions. Word has length 23 [2022-02-11 00:41:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:12,309 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 9476 transitions. [2022-02-11 00:41:12,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 9476 transitions. [2022-02-11 00:41:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:12,313 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:12,313 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:12,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:12,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:12,531 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1422141247, now seen corresponding path program 298 times [2022-02-11 00:41:12,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:12,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314804357] [2022-02-11 00:41:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:12,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:12,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:12,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314804357] [2022-02-11 00:41:12,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314804357] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:12,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071892183] [2022-02-11 00:41:12,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:41:12,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:12,791 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:12,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-11 00:41:13,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:41:13,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:41:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:13,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 234 [2022-02-11 00:41:13,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 264 [2022-02-11 00:41:13,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 243 [2022-02-11 00:41:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:14,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:14,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 209 [2022-02-11 00:41:14,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:14,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-02-11 00:41:14,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:41:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:15,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071892183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:15,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:15,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:41:15,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566180209] [2022-02-11 00:41:15,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:15,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:41:15,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:41:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:41:15,280 INFO L87 Difference]: Start difference. First operand 2454 states and 9476 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:18,531 INFO L93 Difference]: Finished difference Result 4808 states and 16488 transitions. [2022-02-11 00:41:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:41:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:18,540 INFO L225 Difference]: With dead ends: 4808 [2022-02-11 00:41:18,540 INFO L226 Difference]: Without dead ends: 4431 [2022-02-11 00:41:18,541 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=696, Invalid=6110, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:41:18,541 INFO L934 BasicCegarLoop]: 50 mSDtfsCounter, 300 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:18,541 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 924 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:41:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2022-02-11 00:41:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2595. [2022-02-11 00:41:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2594 states have (on average 3.9136468774094064) internal successors, (10152), 2594 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 10152 transitions. [2022-02-11 00:41:18,588 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 10152 transitions. Word has length 23 [2022-02-11 00:41:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:18,588 INFO L470 AbstractCegarLoop]: Abstraction has 2595 states and 10152 transitions. [2022-02-11 00:41:18,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 10152 transitions. [2022-02-11 00:41:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:18,592 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:18,592 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:18,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:18,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:18,807 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1254181529, now seen corresponding path program 299 times [2022-02-11 00:41:18,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:18,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85316922] [2022-02-11 00:41:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:18,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:18,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:18,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85316922] [2022-02-11 00:41:18,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85316922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:18,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648089094] [2022-02-11 00:41:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:41:18,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:18,962 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:18,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-11 00:41:19,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:41:19,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:19,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:19,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-02-11 00:41:19,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:19,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 172 [2022-02-11 00:41:19,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 132 [2022-02-11 00:41:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:20,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:20,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2022-02-11 00:41:20,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:20,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 190 [2022-02-11 00:41:20,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:41:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:20,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648089094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:20,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:20,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:41:20,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187913969] [2022-02-11 00:41:20,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:20,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:41:20,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:41:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:41:20,822 INFO L87 Difference]: Start difference. First operand 2595 states and 10152 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:21,161 INFO L93 Difference]: Finished difference Result 3371 states and 12525 transitions. [2022-02-11 00:41:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:41:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:21,168 INFO L225 Difference]: With dead ends: 3371 [2022-02-11 00:41:21,168 INFO L226 Difference]: Without dead ends: 3231 [2022-02-11 00:41:21,168 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:41:21,168 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:21,168 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 257 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 666 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-02-11 00:41:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2022-02-11 00:41:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 2688. [2022-02-11 00:41:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 3.9077037588388537) internal successors, (10500), 2687 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 10500 transitions. [2022-02-11 00:41:21,207 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 10500 transitions. Word has length 23 [2022-02-11 00:41:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:21,207 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 10500 transitions. [2022-02-11 00:41:21,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 10500 transitions. [2022-02-11 00:41:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:21,211 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:21,211 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:21,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:21,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:21,424 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 399571401, now seen corresponding path program 300 times [2022-02-11 00:41:21,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:21,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550863680] [2022-02-11 00:41:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:21,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:21,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:21,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550863680] [2022-02-11 00:41:21,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550863680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:21,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228278472] [2022-02-11 00:41:21,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:41:21,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:21,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:21,602 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:21,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-11 00:41:21,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:41:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:21,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:22,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:41:22,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:22,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 282 [2022-02-11 00:41:22,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 232 [2022-02-11 00:41:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:22,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:22,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-02-11 00:41:23,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 285 [2022-02-11 00:41:23,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:23,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 260 [2022-02-11 00:41:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:23,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228278472] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:23,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:23,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-02-11 00:41:23,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334442930] [2022-02-11 00:41:23,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:23,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:41:23,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:41:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:41:23,563 INFO L87 Difference]: Start difference. First operand 2688 states and 10500 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:24,015 INFO L93 Difference]: Finished difference Result 3331 states and 12478 transitions. [2022-02-11 00:41:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:41:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:24,054 INFO L225 Difference]: With dead ends: 3331 [2022-02-11 00:41:24,054 INFO L226 Difference]: Without dead ends: 3229 [2022-02-11 00:41:24,055 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:41:24,055 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:24,055 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 305 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 770 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-02-11 00:41:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-02-11 00:41:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2645. [2022-02-11 00:41:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.9156580937972767) internal successors, (10353), 2644 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 10353 transitions. [2022-02-11 00:41:24,090 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 10353 transitions. Word has length 23 [2022-02-11 00:41:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:24,090 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 10353 transitions. [2022-02-11 00:41:24,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 10353 transitions. [2022-02-11 00:41:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:24,094 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:24,094 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:24,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:24,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:24,303 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2102661045, now seen corresponding path program 301 times [2022-02-11 00:41:24,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:24,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621653689] [2022-02-11 00:41:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:24,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:24,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621653689] [2022-02-11 00:41:24,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621653689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:24,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785953410] [2022-02-11 00:41:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:41:24,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:24,411 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:24,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-11 00:41:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:41:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:24,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-02-11 00:41:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:25,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 234 [2022-02-11 00:41:25,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 191 [2022-02-11 00:41:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:25,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:25,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 390 treesize of output 350 [2022-02-11 00:41:26,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 243 [2022-02-11 00:41:26,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:26,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 228 [2022-02-11 00:41:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:26,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785953410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:26,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:26,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:41:26,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745113951] [2022-02-11 00:41:26,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:26,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:41:26,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:41:26,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:41:26,518 INFO L87 Difference]: Start difference. First operand 2645 states and 10353 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:28,259 INFO L93 Difference]: Finished difference Result 3926 states and 13719 transitions. [2022-02-11 00:41:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:41:28,259 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:28,266 INFO L225 Difference]: With dead ends: 3926 [2022-02-11 00:41:28,266 INFO L226 Difference]: Without dead ends: 3458 [2022-02-11 00:41:28,266 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=473, Invalid=4219, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:41:28,267 INFO L934 BasicCegarLoop]: 58 mSDtfsCounter, 216 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:28,267 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1045 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2012 Invalid, 0 Unknown, 891 Unchecked, 0.6s Time] [2022-02-11 00:41:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2022-02-11 00:41:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 2712. [2022-02-11 00:41:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 3.8911840649206937) internal successors, (10549), 2711 states have internal predecessors, (10549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 10549 transitions. [2022-02-11 00:41:28,306 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 10549 transitions. Word has length 23 [2022-02-11 00:41:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:28,306 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 10549 transitions. [2022-02-11 00:41:28,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 10549 transitions. [2022-02-11 00:41:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:28,310 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:28,310 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:28,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-02-11 00:41:28,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-02-11 00:41:28,528 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1215499983, now seen corresponding path program 302 times [2022-02-11 00:41:28,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:28,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642509736] [2022-02-11 00:41:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:28,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:28,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642509736] [2022-02-11 00:41:28,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642509736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:28,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500730746] [2022-02-11 00:41:28,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:41:28,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:28,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:28,642 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:28,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-11 00:41:28,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:41:28,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:28,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:29,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-02-11 00:41:29,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:41:29,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:29,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:41:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:29,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:29,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 207 [2022-02-11 00:41:30,217 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:41:30,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 248 [2022-02-11 00:41:30,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 194 [2022-02-11 00:41:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:30,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500730746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:30,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:30,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-02-11 00:41:30,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744017393] [2022-02-11 00:41:30,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:30,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:41:30,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:41:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:41:30,320 INFO L87 Difference]: Start difference. First operand 2712 states and 10549 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:31,505 INFO L93 Difference]: Finished difference Result 3699 states and 13779 transitions. [2022-02-11 00:41:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:41:31,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:31,512 INFO L225 Difference]: With dead ends: 3699 [2022-02-11 00:41:31,512 INFO L226 Difference]: Without dead ends: 3589 [2022-02-11 00:41:31,513 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=343, Invalid=2627, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:41:31,513 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:31,513 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 635 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1480 Invalid, 0 Unknown, 361 Unchecked, 0.4s Time] [2022-02-11 00:41:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-02-11 00:41:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2713. [2022-02-11 00:41:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 3.8934365781710913) internal successors, (10559), 2712 states have internal predecessors, (10559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 10559 transitions. [2022-02-11 00:41:31,556 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 10559 transitions. Word has length 23 [2022-02-11 00:41:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:31,556 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 10559 transitions. [2022-02-11 00:41:31,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 10559 transitions. [2022-02-11 00:41:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:31,560 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:31,560 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:31,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:31,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:31,775 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1141889615, now seen corresponding path program 303 times [2022-02-11 00:41:31,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:31,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55491748] [2022-02-11 00:41:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:31,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:31,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55491748] [2022-02-11 00:41:31,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55491748] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:31,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248831436] [2022-02-11 00:41:31,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:41:31,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:31,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:31,915 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:31,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-11 00:41:32,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:41:32,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:32,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:32,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 186 [2022-02-11 00:41:32,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:32,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 260 [2022-02-11 00:41:32,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-02-11 00:41:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:32,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:33,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:41:33,408 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:41:33,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 224 [2022-02-11 00:41:33,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:41:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:33,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248831436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:33,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:33,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-02-11 00:41:33,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869376880] [2022-02-11 00:41:33,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:33,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:41:33,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:41:33,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:41:33,574 INFO L87 Difference]: Start difference. First operand 2713 states and 10559 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:35,207 INFO L93 Difference]: Finished difference Result 3636 states and 13524 transitions. [2022-02-11 00:41:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:41:35,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:35,214 INFO L225 Difference]: With dead ends: 3636 [2022-02-11 00:41:35,214 INFO L226 Difference]: Without dead ends: 3556 [2022-02-11 00:41:35,214 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:41:35,215 INFO L934 BasicCegarLoop]: 38 mSDtfsCounter, 128 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:35,215 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 700 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1760 Invalid, 0 Unknown, 110 Unchecked, 0.6s Time] [2022-02-11 00:41:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2022-02-11 00:41:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2715. [2022-02-11 00:41:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 3.8942520265291085) internal successors, (10569), 2714 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 10569 transitions. [2022-02-11 00:41:35,254 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 10569 transitions. Word has length 23 [2022-02-11 00:41:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:35,254 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 10569 transitions. [2022-02-11 00:41:35,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 10569 transitions. [2022-02-11 00:41:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:35,258 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:35,258 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:35,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:35,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-02-11 00:41:35,475 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash 339906849, now seen corresponding path program 304 times [2022-02-11 00:41:35,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:35,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678408938] [2022-02-11 00:41:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:35,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:35,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678408938] [2022-02-11 00:41:35,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678408938] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:35,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96701302] [2022-02-11 00:41:35,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:41:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:35,595 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:35,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-11 00:41:35,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:41:35,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:36,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:41:36,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:36,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 210 [2022-02-11 00:41:36,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-02-11 00:41:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:36,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:36,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-02-11 00:41:37,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 277 [2022-02-11 00:41:37,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:37,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 264 [2022-02-11 00:41:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:37,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96701302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:37,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:37,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:41:37,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159723741] [2022-02-11 00:41:37,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:37,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:41:37,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:41:37,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:41:37,284 INFO L87 Difference]: Start difference. First operand 2715 states and 10569 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:40,498 INFO L93 Difference]: Finished difference Result 4433 states and 15977 transitions. [2022-02-11 00:41:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:41:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:40,507 INFO L225 Difference]: With dead ends: 4433 [2022-02-11 00:41:40,507 INFO L226 Difference]: Without dead ends: 4315 [2022-02-11 00:41:40,508 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 34 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=972, Invalid=6510, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 00:41:40,508 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 399 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:40,508 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 662 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1624 Invalid, 0 Unknown, 380 Unchecked, 0.6s Time] [2022-02-11 00:41:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2022-02-11 00:41:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2629. [2022-02-11 00:41:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.86910197869102) internal successors, (10168), 2628 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10168 transitions. [2022-02-11 00:41:40,552 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10168 transitions. Word has length 23 [2022-02-11 00:41:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:40,552 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 10168 transitions. [2022-02-11 00:41:40,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10168 transitions. [2022-02-11 00:41:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:40,556 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:40,556 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:40,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-02-11 00:41:40,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-02-11 00:41:40,763 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1107162753, now seen corresponding path program 305 times [2022-02-11 00:41:40,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:40,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229908674] [2022-02-11 00:41:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:40,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:40,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229908674] [2022-02-11 00:41:40,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229908674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:40,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971916370] [2022-02-11 00:41:40,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:41:40,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:40,963 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:40,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-11 00:41:41,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:41:41,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:41:41,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:41,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 153 [2022-02-11 00:41:41,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 183 [2022-02-11 00:41:41,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 170 [2022-02-11 00:41:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:41,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:41,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:41:42,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 235 [2022-02-11 00:41:42,266 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:41:42,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 211 [2022-02-11 00:41:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:42,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971916370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:42,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:42,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:41:42,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268941256] [2022-02-11 00:41:42,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:42,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:41:42,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:41:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:41:42,430 INFO L87 Difference]: Start difference. First operand 2629 states and 10168 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:50,374 INFO L93 Difference]: Finished difference Result 5453 states and 18718 transitions. [2022-02-11 00:41:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-11 00:41:50,375 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:50,383 INFO L225 Difference]: With dead ends: 5453 [2022-02-11 00:41:50,384 INFO L226 Difference]: Without dead ends: 4955 [2022-02-11 00:41:50,384 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2204, Invalid=15886, Unknown=0, NotChecked=0, Total=18090 [2022-02-11 00:41:50,385 INFO L934 BasicCegarLoop]: 74 mSDtfsCounter, 517 mSDsluCounter, 3044 mSDsCounter, 0 mSdLazyCounter, 5049 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 5049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:50,385 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1411 Invalid, 5254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 5049 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-11 00:41:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2022-02-11 00:41:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 2687. [2022-02-11 00:41:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 3.8466120625465376) internal successors, (10332), 2686 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 10332 transitions. [2022-02-11 00:41:50,432 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 10332 transitions. Word has length 23 [2022-02-11 00:41:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:50,432 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 10332 transitions. [2022-02-11 00:41:50,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 10332 transitions. [2022-02-11 00:41:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:50,436 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:50,436 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:50,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-02-11 00:41:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-02-11 00:41:50,639 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1843242201, now seen corresponding path program 306 times [2022-02-11 00:41:50,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:50,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514197657] [2022-02-11 00:41:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:50,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:50,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:50,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514197657] [2022-02-11 00:41:50,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514197657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:50,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707292478] [2022-02-11 00:41:50,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:41:50,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:50,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:50,749 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:50,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-11 00:41:51,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:41:51,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:51,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 140 [2022-02-11 00:41:51,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:41:51,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-02-11 00:41:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:51,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:51,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:41:51,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:41:51,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:51,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 167 [2022-02-11 00:41:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:41:52,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707292478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:52,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:52,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:41:52,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002266576] [2022-02-11 00:41:52,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:52,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:41:52,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:41:52,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:41:52,121 INFO L87 Difference]: Start difference. First operand 2687 states and 10332 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:55,957 INFO L93 Difference]: Finished difference Result 5756 states and 19860 transitions. [2022-02-11 00:41:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-11 00:41:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:41:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:55,968 INFO L225 Difference]: With dead ends: 5756 [2022-02-11 00:41:55,969 INFO L226 Difference]: Without dead ends: 5400 [2022-02-11 00:41:55,971 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1039, Invalid=14711, Unknown=0, NotChecked=0, Total=15750 [2022-02-11 00:41:55,971 INFO L934 BasicCegarLoop]: 86 mSDtfsCounter, 314 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 6276 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 6477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 6276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:55,971 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1587 Invalid, 6477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 6276 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 00:41:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-02-11 00:41:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2793. [2022-02-11 00:41:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.866045845272206) internal successors, (10794), 2792 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10794 transitions. [2022-02-11 00:41:56,063 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10794 transitions. Word has length 23 [2022-02-11 00:41:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:56,064 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 10794 transitions. [2022-02-11 00:41:56,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10794 transitions. [2022-02-11 00:41:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:41:56,068 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:56,068 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:56,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:56,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-02-11 00:41:56,285 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:41:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1821663053, now seen corresponding path program 307 times [2022-02-11 00:41:56,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:56,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790300690] [2022-02-11 00:41:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:56,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:56,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790300690] [2022-02-11 00:41:56,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790300690] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:56,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955844541] [2022-02-11 00:41:56,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:41:56,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:56,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:56,370 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:56,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-11 00:41:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:41:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:56,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-02-11 00:41:56,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 176 [2022-02-11 00:41:56,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 191 [2022-02-11 00:41:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:57,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:57,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 265 [2022-02-11 00:41:57,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 182 [2022-02-11 00:41:57,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:57,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 179 [2022-02-11 00:41:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:41:57,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955844541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:57,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:57,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:41:57,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354377846] [2022-02-11 00:41:57,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:57,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:41:57,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:41:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:41:57,813 INFO L87 Difference]: Start difference. First operand 2793 states and 10794 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:03,074 INFO L93 Difference]: Finished difference Result 6951 states and 23527 transitions. [2022-02-11 00:42:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-11 00:42:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:03,087 INFO L225 Difference]: With dead ends: 6951 [2022-02-11 00:42:03,087 INFO L226 Difference]: Without dead ends: 6534 [2022-02-11 00:42:03,089 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10284 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2367, Invalid=24365, Unknown=0, NotChecked=0, Total=26732 [2022-02-11 00:42:03,089 INFO L934 BasicCegarLoop]: 79 mSDtfsCounter, 508 mSDsluCounter, 2478 mSDsCounter, 0 mSdLazyCounter, 4159 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 4452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 4159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:03,089 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1311 Invalid, 4452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 4159 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:42:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-02-11 00:42:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 2956. [2022-02-11 00:42:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.8967851099830795) internal successors, (11515), 2955 states have internal predecessors, (11515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 11515 transitions. [2022-02-11 00:42:03,154 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 11515 transitions. Word has length 23 [2022-02-11 00:42:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:03,154 INFO L470 AbstractCegarLoop]: Abstraction has 2956 states and 11515 transitions. [2022-02-11 00:42:03,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 11515 transitions. [2022-02-11 00:42:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:03,158 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:03,158 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:03,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:03,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:03,371 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -69343389, now seen corresponding path program 308 times [2022-02-11 00:42:03,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:03,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109382532] [2022-02-11 00:42:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:03,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:03,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109382532] [2022-02-11 00:42:03,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109382532] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:03,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765851921] [2022-02-11 00:42:03,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:42:03,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:03,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:03,463 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:03,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-11 00:42:03,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:42:03,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:42:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:03,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 231 [2022-02-11 00:42:04,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 187 [2022-02-11 00:42:04,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2022-02-11 00:42:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:04,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:04,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:42:04,823 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:42:04,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 186 [2022-02-11 00:42:04,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-02-11 00:42:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:04,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765851921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:04,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:04,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:42:04,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007506312] [2022-02-11 00:42:04,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:04,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:42:04,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:04,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:42:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:42:04,958 INFO L87 Difference]: Start difference. First operand 2956 states and 11515 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:10,131 INFO L93 Difference]: Finished difference Result 5445 states and 19195 transitions. [2022-02-11 00:42:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-11 00:42:10,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:10,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:10,141 INFO L225 Difference]: With dead ends: 5445 [2022-02-11 00:42:10,141 INFO L226 Difference]: Without dead ends: 5199 [2022-02-11 00:42:10,142 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4793 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1184, Invalid=13822, Unknown=0, NotChecked=0, Total=15006 [2022-02-11 00:42:10,142 INFO L934 BasicCegarLoop]: 76 mSDtfsCounter, 283 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 6463 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 6635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 6463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:10,142 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1481 Invalid, 6635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 6463 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-11 00:42:10,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2022-02-11 00:42:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 3010. [2022-02-11 00:42:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.893320039880359) internal successors, (11715), 3009 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 11715 transitions. [2022-02-11 00:42:10,194 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 11715 transitions. Word has length 23 [2022-02-11 00:42:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:10,194 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 11715 transitions. [2022-02-11 00:42:10,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 11715 transitions. [2022-02-11 00:42:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:10,198 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:10,198 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:10,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:10,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:10,416 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1438999053, now seen corresponding path program 309 times [2022-02-11 00:42:10,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:10,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260459230] [2022-02-11 00:42:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:10,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:10,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:10,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260459230] [2022-02-11 00:42:10,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260459230] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:10,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356188509] [2022-02-11 00:42:10,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:42:10,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:10,655 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:10,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-11 00:42:10,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:42:10,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:42:10,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:11,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-02-11 00:42:11,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 147 [2022-02-11 00:42:11,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:11,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:42:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:11,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:11,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-02-11 00:42:12,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:12,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 303 [2022-02-11 00:42:12,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 236 [2022-02-11 00:42:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:12,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356188509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:12,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:12,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:42:12,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773152838] [2022-02-11 00:42:12,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:12,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:42:12,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:42:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:42:12,495 INFO L87 Difference]: Start difference. First operand 3010 states and 11715 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:13,277 INFO L93 Difference]: Finished difference Result 3803 states and 14195 transitions. [2022-02-11 00:42:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-11 00:42:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:13,284 INFO L225 Difference]: With dead ends: 3803 [2022-02-11 00:42:13,284 INFO L226 Difference]: Without dead ends: 3749 [2022-02-11 00:42:13,284 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:42:13,285 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:13,285 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 486 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1442 Invalid, 0 Unknown, 251 Unchecked, 0.5s Time] [2022-02-11 00:42:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-02-11 00:42:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3031. [2022-02-11 00:42:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 3.89009900990099) internal successors, (11787), 3030 states have internal predecessors, (11787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 11787 transitions. [2022-02-11 00:42:13,357 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 11787 transitions. Word has length 23 [2022-02-11 00:42:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:13,357 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 11787 transitions. [2022-02-11 00:42:13,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 11787 transitions. [2022-02-11 00:42:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:13,361 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:13,361 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:13,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-02-11 00:42:13,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-02-11 00:42:13,579 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash 958946091, now seen corresponding path program 310 times [2022-02-11 00:42:13,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:13,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047120084] [2022-02-11 00:42:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:13,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:13,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:13,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047120084] [2022-02-11 00:42:13,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047120084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:13,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655109688] [2022-02-11 00:42:13,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:42:13,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:13,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:13,659 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:13,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-11 00:42:13,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:42:13,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:42:13,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:14,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-02-11 00:42:14,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:42:14,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:14,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:42:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:14,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:14,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:42:14,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:42:14,892 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:42:14,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 152 [2022-02-11 00:42:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:15,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655109688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:15,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:15,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:42:15,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918867415] [2022-02-11 00:42:15,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:15,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:42:15,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:42:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:42:15,009 INFO L87 Difference]: Start difference. First operand 3031 states and 11787 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:15,316 INFO L93 Difference]: Finished difference Result 3874 states and 14532 transitions. [2022-02-11 00:42:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 00:42:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:15,323 INFO L225 Difference]: With dead ends: 3874 [2022-02-11 00:42:15,324 INFO L226 Difference]: Without dead ends: 3729 [2022-02-11 00:42:15,324 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:42:15,324 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:15,324 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 330 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 623 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-02-11 00:42:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-02-11 00:42:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3112. [2022-02-11 00:42:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 3111 states have (on average 3.863066538090646) internal successors, (12018), 3111 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 12018 transitions. [2022-02-11 00:42:15,390 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 12018 transitions. Word has length 23 [2022-02-11 00:42:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:15,390 INFO L470 AbstractCegarLoop]: Abstraction has 3112 states and 12018 transitions. [2022-02-11 00:42:15,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 12018 transitions. [2022-02-11 00:42:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:15,395 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:15,395 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:15,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:15,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2022-02-11 00:42:15,611 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1147838029, now seen corresponding path program 311 times [2022-02-11 00:42:15,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:15,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147685311] [2022-02-11 00:42:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:15,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:15,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:15,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147685311] [2022-02-11 00:42:15,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147685311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:15,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277028757] [2022-02-11 00:42:15,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:42:15,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:15,800 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:15,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-11 00:42:16,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:42:16,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:42:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:16,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:16,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 183 [2022-02-11 00:42:17,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 274 [2022-02-11 00:42:17,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:17,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 238 [2022-02-11 00:42:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:18,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:19,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:19,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 417 treesize of output 367 [2022-02-11 00:42:19,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:19,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 272 [2022-02-11 00:42:19,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:19,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 248 [2022-02-11 00:42:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:20,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277028757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:20,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:20,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-11 00:42:20,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475037376] [2022-02-11 00:42:20,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:20,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:42:20,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:42:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:42:20,366 INFO L87 Difference]: Start difference. First operand 3112 states and 12018 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:24,307 INFO L93 Difference]: Finished difference Result 4950 states and 17619 transitions. [2022-02-11 00:42:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:42:24,307 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:24,317 INFO L225 Difference]: With dead ends: 4950 [2022-02-11 00:42:24,317 INFO L226 Difference]: Without dead ends: 4905 [2022-02-11 00:42:24,318 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=564, Invalid=5598, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 00:42:24,318 INFO L934 BasicCegarLoop]: 46 mSDtfsCounter, 253 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:24,318 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1053 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3134 Invalid, 0 Unknown, 256 Unchecked, 1.0s Time] [2022-02-11 00:42:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4905 states. [2022-02-11 00:42:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4905 to 3317. [2022-02-11 00:42:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 3.8917370325693605) internal successors, (12905), 3316 states have internal predecessors, (12905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 12905 transitions. [2022-02-11 00:42:24,373 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 12905 transitions. Word has length 23 [2022-02-11 00:42:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:24,373 INFO L470 AbstractCegarLoop]: Abstraction has 3317 states and 12905 transitions. [2022-02-11 00:42:24,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 12905 transitions. [2022-02-11 00:42:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:24,378 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:24,378 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:24,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-02-11 00:42:24,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:24,595 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2072215047, now seen corresponding path program 312 times [2022-02-11 00:42:24,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:24,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414743368] [2022-02-11 00:42:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:24,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:24,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414743368] [2022-02-11 00:42:24,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414743368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:24,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697636367] [2022-02-11 00:42:24,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:42:24,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:24,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:24,786 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:24,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-11 00:42:25,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:42:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:42:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:25,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 163 [2022-02-11 00:42:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:25,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 158 [2022-02-11 00:42:25,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-02-11 00:42:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:25,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:25,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 173 [2022-02-11 00:42:26,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:42:26,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:26,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 168 [2022-02-11 00:42:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:26,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697636367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:26,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:26,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:42:26,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287086629] [2022-02-11 00:42:26,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:26,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:42:26,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:42:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:42:26,378 INFO L87 Difference]: Start difference. First operand 3317 states and 12905 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:30,704 INFO L93 Difference]: Finished difference Result 5095 states and 18370 transitions. [2022-02-11 00:42:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 00:42:30,705 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:30,714 INFO L225 Difference]: With dead ends: 5095 [2022-02-11 00:42:30,714 INFO L226 Difference]: Without dead ends: 4887 [2022-02-11 00:42:30,715 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1041, Invalid=8661, Unknown=0, NotChecked=0, Total=9702 [2022-02-11 00:42:30,715 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 311 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 3521 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:30,715 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 916 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3521 Invalid, 0 Unknown, 232 Unchecked, 1.1s Time] [2022-02-11 00:42:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4887 states. [2022-02-11 00:42:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4887 to 3376. [2022-02-11 00:42:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 3.9114074074074074) internal successors, (13201), 3375 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 13201 transitions. [2022-02-11 00:42:30,778 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 13201 transitions. Word has length 23 [2022-02-11 00:42:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:30,778 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 13201 transitions. [2022-02-11 00:42:30,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 13201 transitions. [2022-02-11 00:42:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:30,783 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:30,783 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:30,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-02-11 00:42:30,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:30,987 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1424260133, now seen corresponding path program 313 times [2022-02-11 00:42:30,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:30,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149427191] [2022-02-11 00:42:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:31,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:31,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149427191] [2022-02-11 00:42:31,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149427191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:31,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880295327] [2022-02-11 00:42:31,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:42:31,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:31,214 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:31,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-11 00:42:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:31,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:42:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:31,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:42:31,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:42:31,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 124 [2022-02-11 00:42:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:32,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:32,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-02-11 00:42:32,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:32,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 188 [2022-02-11 00:42:32,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 157 [2022-02-11 00:42:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:32,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880295327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:32,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:32,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:42:32,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731579530] [2022-02-11 00:42:32,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:32,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:42:32,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:42:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:42:32,761 INFO L87 Difference]: Start difference. First operand 3376 states and 13201 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:35,853 INFO L93 Difference]: Finished difference Result 5003 states and 17919 transitions. [2022-02-11 00:42:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 00:42:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:35,862 INFO L225 Difference]: With dead ends: 5003 [2022-02-11 00:42:35,863 INFO L226 Difference]: Without dead ends: 4794 [2022-02-11 00:42:35,863 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=682, Invalid=7508, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 00:42:35,863 INFO L934 BasicCegarLoop]: 70 mSDtfsCounter, 240 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 3620 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 3746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:35,864 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1256 Invalid, 3746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3620 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:42:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4794 states. [2022-02-11 00:42:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4794 to 3425. [2022-02-11 00:42:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3424 states have (on average 3.9091705607476634) internal successors, (13385), 3424 states have internal predecessors, (13385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 13385 transitions. [2022-02-11 00:42:35,919 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 13385 transitions. Word has length 23 [2022-02-11 00:42:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:35,919 INFO L470 AbstractCegarLoop]: Abstraction has 3425 states and 13385 transitions. [2022-02-11 00:42:35,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 13385 transitions. [2022-02-11 00:42:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:35,924 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:35,924 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:35,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:36,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-02-11 00:42:36,139 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash 970057749, now seen corresponding path program 314 times [2022-02-11 00:42:36,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:36,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970925448] [2022-02-11 00:42:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:36,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:36,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:36,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970925448] [2022-02-11 00:42:36,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970925448] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:36,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554305579] [2022-02-11 00:42:36,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:42:36,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:36,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:36,224 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:36,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-11 00:42:36,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:42:36,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:42:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:36,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 147 [2022-02-11 00:42:36,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:42:36,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 124 [2022-02-11 00:42:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:42:37,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:37,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:42:37,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:37,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 177 [2022-02-11 00:42:37,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:42:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:42:37,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554305579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:37,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:37,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:42:37,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223187641] [2022-02-11 00:42:37,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:37,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:42:37,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:42:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:42:37,724 INFO L87 Difference]: Start difference. First operand 3425 states and 13385 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:39,865 INFO L93 Difference]: Finished difference Result 5460 states and 19607 transitions. [2022-02-11 00:42:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 00:42:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:39,875 INFO L225 Difference]: With dead ends: 5460 [2022-02-11 00:42:39,875 INFO L226 Difference]: Without dead ends: 5118 [2022-02-11 00:42:39,876 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=560, Invalid=6412, Unknown=0, NotChecked=0, Total=6972 [2022-02-11 00:42:39,876 INFO L934 BasicCegarLoop]: 70 mSDtfsCounter, 203 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 3898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:39,876 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1048 Invalid, 3898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:42:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2022-02-11 00:42:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 3488. [2022-02-11 00:42:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 3487 states have (on average 3.909377688557499) internal successors, (13632), 3487 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 13632 transitions. [2022-02-11 00:42:39,934 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 13632 transitions. Word has length 23 [2022-02-11 00:42:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:39,935 INFO L470 AbstractCegarLoop]: Abstraction has 3488 states and 13632 transitions. [2022-02-11 00:42:39,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 13632 transitions. [2022-02-11 00:42:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:39,940 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:39,940 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:39,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-02-11 00:42:40,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-02-11 00:42:40,143 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:40,143 INFO L85 PathProgramCache]: Analyzing trace with hash 926048385, now seen corresponding path program 315 times [2022-02-11 00:42:40,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:40,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000691236] [2022-02-11 00:42:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:40,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:42:40,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:40,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000691236] [2022-02-11 00:42:40,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000691236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:40,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877127703] [2022-02-11 00:42:40,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:42:40,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:40,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:40,314 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:40,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-11 00:42:40,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:42:40,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:42:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:40,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 196 [2022-02-11 00:42:41,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 247 [2022-02-11 00:42:41,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 200 [2022-02-11 00:42:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:41,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:41,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:42:41,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:41,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 201 [2022-02-11 00:42:41,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-02-11 00:42:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:42,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877127703] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:42,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:42,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:42:42,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493983564] [2022-02-11 00:42:42,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:42,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:42:42,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:42:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:42:42,061 INFO L87 Difference]: Start difference. First operand 3488 states and 13632 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:47,899 INFO L93 Difference]: Finished difference Result 5924 states and 21186 transitions. [2022-02-11 00:42:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-11 00:42:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:47,909 INFO L225 Difference]: With dead ends: 5924 [2022-02-11 00:42:47,909 INFO L226 Difference]: Without dead ends: 5135 [2022-02-11 00:42:47,910 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7778 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1821, Invalid=20529, Unknown=0, NotChecked=0, Total=22350 [2022-02-11 00:42:47,910 INFO L934 BasicCegarLoop]: 87 mSDtfsCounter, 385 mSDsluCounter, 2542 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 5016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:47,910 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 1460 Invalid, 5016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 00:42:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2022-02-11 00:42:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 3591. [2022-02-11 00:42:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3591 states, 3590 states have (on average 3.917548746518106) internal successors, (14064), 3590 states have internal predecessors, (14064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 14064 transitions. [2022-02-11 00:42:47,970 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 14064 transitions. Word has length 23 [2022-02-11 00:42:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:47,970 INFO L470 AbstractCegarLoop]: Abstraction has 3591 states and 14064 transitions. [2022-02-11 00:42:47,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 14064 transitions. [2022-02-11 00:42:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:47,976 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:47,976 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:47,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-02-11 00:42:48,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-02-11 00:42:48,178 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1740324309, now seen corresponding path program 316 times [2022-02-11 00:42:48,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:48,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948014732] [2022-02-11 00:42:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:48,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:48,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:48,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948014732] [2022-02-11 00:42:48,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948014732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:48,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777424823] [2022-02-11 00:42:48,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:42:48,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:48,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:48,305 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:48,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-11 00:42:48,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:42:48,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:42:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:48,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:42:48,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 168 [2022-02-11 00:42:48,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:42:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:49,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:49,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 235 [2022-02-11 00:42:49,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:42:49,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:49,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 167 [2022-02-11 00:42:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:50,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777424823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:50,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:50,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-11 00:42:50,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917001649] [2022-02-11 00:42:50,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:50,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:42:50,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:42:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:42:50,063 INFO L87 Difference]: Start difference. First operand 3591 states and 14064 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:54,213 INFO L93 Difference]: Finished difference Result 6421 states and 22726 transitions. [2022-02-11 00:42:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-11 00:42:54,213 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:54,224 INFO L225 Difference]: With dead ends: 6421 [2022-02-11 00:42:54,225 INFO L226 Difference]: Without dead ends: 5972 [2022-02-11 00:42:54,225 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=938, Invalid=12172, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 00:42:54,225 INFO L934 BasicCegarLoop]: 84 mSDtfsCounter, 329 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 4721 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 4721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:54,225 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 1397 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 4721 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:42:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2022-02-11 00:42:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 3653. [2022-02-11 00:42:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.9345564074479737) internal successors, (14369), 3652 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 14369 transitions. [2022-02-11 00:42:54,310 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 14369 transitions. Word has length 23 [2022-02-11 00:42:54,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:54,310 INFO L470 AbstractCegarLoop]: Abstraction has 3653 states and 14369 transitions. [2022-02-11 00:42:54,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 14369 transitions. [2022-02-11 00:42:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:54,326 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:54,327 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:54,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-02-11 00:42:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:54,527 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:54,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1691663467, now seen corresponding path program 317 times [2022-02-11 00:42:54,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:54,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308027131] [2022-02-11 00:42:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:54,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:54,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:54,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308027131] [2022-02-11 00:42:54,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308027131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:54,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218740737] [2022-02-11 00:42:54,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:42:54,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:54,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:54,601 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:54,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-11 00:42:54,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:42:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:42:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:55,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 226 [2022-02-11 00:42:55,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-02-11 00:42:55,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:55,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:42:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:55,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:55,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:42:55,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:55,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 190 [2022-02-11 00:42:55,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:42:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:56,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218740737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:56,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:56,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-11 00:42:56,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412050723] [2022-02-11 00:42:56,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:56,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:42:56,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:56,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:42:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:42:56,150 INFO L87 Difference]: Start difference. First operand 3653 states and 14369 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:56,515 INFO L93 Difference]: Finished difference Result 4565 states and 17214 transitions. [2022-02-11 00:42:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:42:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:42:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:56,524 INFO L225 Difference]: With dead ends: 4565 [2022-02-11 00:42:56,524 INFO L226 Difference]: Without dead ends: 4445 [2022-02-11 00:42:56,525 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:42:56,525 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:56,525 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 364 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 933 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2022-02-11 00:42:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4445 states. [2022-02-11 00:42:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4445 to 3777. [2022-02-11 00:42:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 3.9253177966101696) internal successors, (14822), 3776 states have internal predecessors, (14822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 14822 transitions. [2022-02-11 00:42:56,590 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 14822 transitions. Word has length 23 [2022-02-11 00:42:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:56,590 INFO L470 AbstractCegarLoop]: Abstraction has 3777 states and 14822 transitions. [2022-02-11 00:42:56,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 14822 transitions. [2022-02-11 00:42:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:42:56,597 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:56,597 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:56,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:56,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:56,811 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:42:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash 937360725, now seen corresponding path program 318 times [2022-02-11 00:42:56,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:56,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689959750] [2022-02-11 00:42:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:42:56,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:56,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689959750] [2022-02-11 00:42:56,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689959750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:56,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943762699] [2022-02-11 00:42:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:42:56,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:56,913 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:56,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-11 00:42:57,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:42:57,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:42:57,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:57,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-02-11 00:42:57,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:42:57,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:42:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:58,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:42:58,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:42:58,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:58,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 169 [2022-02-11 00:42:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:58,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943762699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:58,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:58,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:42:58,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745477765] [2022-02-11 00:42:58,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:58,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:42:58,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:42:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:42:58,452 INFO L87 Difference]: Start difference. First operand 3777 states and 14822 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:01,156 INFO L93 Difference]: Finished difference Result 5670 states and 20872 transitions. [2022-02-11 00:43:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 00:43:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:01,167 INFO L225 Difference]: With dead ends: 5670 [2022-02-11 00:43:01,167 INFO L226 Difference]: Without dead ends: 5490 [2022-02-11 00:43:01,167 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=571, Invalid=6911, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 00:43:01,167 INFO L934 BasicCegarLoop]: 70 mSDtfsCounter, 243 mSDsluCounter, 2213 mSDsCounter, 0 mSdLazyCounter, 3860 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 4002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:01,167 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1127 Invalid, 4002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 3860 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:43:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2022-02-11 00:43:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 3794. [2022-02-11 00:43:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 3.930398101766412) internal successors, (14908), 3793 states have internal predecessors, (14908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 14908 transitions. [2022-02-11 00:43:01,231 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 14908 transitions. Word has length 23 [2022-02-11 00:43:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:01,231 INFO L470 AbstractCegarLoop]: Abstraction has 3794 states and 14908 transitions. [2022-02-11 00:43:01,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 14908 transitions. [2022-02-11 00:43:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:01,255 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:01,255 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:01,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:01,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-02-11 00:43:01,472 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -939918963, now seen corresponding path program 319 times [2022-02-11 00:43:01,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:01,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102095282] [2022-02-11 00:43:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:01,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:01,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102095282] [2022-02-11 00:43:01,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102095282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:01,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039095747] [2022-02-11 00:43:01,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:43:01,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:01,566 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:01,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-11 00:43:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:01,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:43:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:02,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 192 [2022-02-11 00:43:02,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 195 [2022-02-11 00:43:02,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-02-11 00:43:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:02,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:02,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:43:02,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:43:02,792 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:43:02,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 152 [2022-02-11 00:43:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:02,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039095747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:02,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:02,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-02-11 00:43:02,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650790971] [2022-02-11 00:43:02,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:02,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:43:02,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:43:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:43:02,920 INFO L87 Difference]: Start difference. First operand 3794 states and 14908 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:09,897 INFO L93 Difference]: Finished difference Result 6728 states and 23809 transitions. [2022-02-11 00:43:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-11 00:43:09,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:09,910 INFO L225 Difference]: With dead ends: 6728 [2022-02-11 00:43:09,910 INFO L226 Difference]: Without dead ends: 6277 [2022-02-11 00:43:09,912 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10117 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2263, Invalid=25793, Unknown=0, NotChecked=0, Total=28056 [2022-02-11 00:43:09,912 INFO L934 BasicCegarLoop]: 82 mSDtfsCounter, 562 mSDsluCounter, 2514 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 4459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:09,912 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1475 Invalid, 4459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 4215 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:43:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2022-02-11 00:43:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 3736. [2022-02-11 00:43:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 3.9552878179384203) internal successors, (14773), 3735 states have internal predecessors, (14773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 14773 transitions. [2022-02-11 00:43:09,983 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 14773 transitions. Word has length 23 [2022-02-11 00:43:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:09,983 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 14773 transitions. [2022-02-11 00:43:09,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 14773 transitions. [2022-02-11 00:43:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:09,988 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:09,988 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:10,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-02-11 00:43:10,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-02-11 00:43:10,206 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash 248580775, now seen corresponding path program 320 times [2022-02-11 00:43:10,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:10,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636969557] [2022-02-11 00:43:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:10,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:10,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:10,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636969557] [2022-02-11 00:43:10,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636969557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:10,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564112596] [2022-02-11 00:43:10,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:10,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:10,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:10,285 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-11 00:43:10,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:10,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:10,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 234 [2022-02-11 00:43:11,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:43:11,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 132 [2022-02-11 00:43:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:11,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:11,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 263 [2022-02-11 00:43:11,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 211 [2022-02-11 00:43:11,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:11,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 192 [2022-02-11 00:43:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:12,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564112596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:12,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:12,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:43:12,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896094108] [2022-02-11 00:43:12,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:12,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:43:12,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:43:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:43:12,041 INFO L87 Difference]: Start difference. First operand 3736 states and 14773 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:17,071 INFO L93 Difference]: Finished difference Result 6809 states and 24120 transitions. [2022-02-11 00:43:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-11 00:43:17,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:17,085 INFO L225 Difference]: With dead ends: 6809 [2022-02-11 00:43:17,085 INFO L226 Difference]: Without dead ends: 6448 [2022-02-11 00:43:17,087 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5488 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1425, Invalid=14325, Unknown=0, NotChecked=0, Total=15750 [2022-02-11 00:43:17,087 INFO L934 BasicCegarLoop]: 59 mSDtfsCounter, 404 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 3683 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 3859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:17,087 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1094 Invalid, 3859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3683 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:43:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2022-02-11 00:43:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 3895. [2022-02-11 00:43:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 3.9871597329224446) internal successors, (15526), 3894 states have internal predecessors, (15526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 15526 transitions. [2022-02-11 00:43:17,182 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 15526 transitions. Word has length 23 [2022-02-11 00:43:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:17,182 INFO L470 AbstractCegarLoop]: Abstraction has 3895 states and 15526 transitions. [2022-02-11 00:43:17,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 15526 transitions. [2022-02-11 00:43:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:17,188 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:17,188 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:17,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-02-11 00:43:17,402 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:17,402 INFO L85 PathProgramCache]: Analyzing trace with hash 875820655, now seen corresponding path program 321 times [2022-02-11 00:43:17,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:17,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483441649] [2022-02-11 00:43:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:17,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:17,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:17,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483441649] [2022-02-11 00:43:17,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483441649] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:17,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354593737] [2022-02-11 00:43:17,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:43:17,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:17,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:17,520 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:17,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-11 00:43:17,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:43:17,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:17,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:17,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:43:18,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 164 [2022-02-11 00:43:18,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-02-11 00:43:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:18,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:18,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:43:18,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-02-11 00:43:18,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:18,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 258 treesize of output 220 [2022-02-11 00:43:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:18,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354593737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:18,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:18,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:43:18,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476888505] [2022-02-11 00:43:18,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:18,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:43:18,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:43:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:43:18,738 INFO L87 Difference]: Start difference. First operand 3895 states and 15526 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:22,153 INFO L93 Difference]: Finished difference Result 5836 states and 21231 transitions. [2022-02-11 00:43:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-11 00:43:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:22,165 INFO L225 Difference]: With dead ends: 5836 [2022-02-11 00:43:22,165 INFO L226 Difference]: Without dead ends: 5545 [2022-02-11 00:43:22,166 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=807, Invalid=8313, Unknown=0, NotChecked=0, Total=9120 [2022-02-11 00:43:22,166 INFO L934 BasicCegarLoop]: 70 mSDtfsCounter, 244 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 3824 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:22,166 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1172 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3824 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:43:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5545 states. [2022-02-11 00:43:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5545 to 3895. [2022-02-11 00:43:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 3.9699537750385208) internal successors, (15459), 3894 states have internal predecessors, (15459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 15459 transitions. [2022-02-11 00:43:22,232 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 15459 transitions. Word has length 23 [2022-02-11 00:43:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:22,232 INFO L470 AbstractCegarLoop]: Abstraction has 3895 states and 15459 transitions. [2022-02-11 00:43:22,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 15459 transitions. [2022-02-11 00:43:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:22,238 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:22,238 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:22,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-02-11 00:43:22,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:22,440 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1642425667, now seen corresponding path program 322 times [2022-02-11 00:43:22,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:22,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432850995] [2022-02-11 00:43:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:22,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:22,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:22,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432850995] [2022-02-11 00:43:22,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432850995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:22,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440305180] [2022-02-11 00:43:22,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:43:22,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:22,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:22,609 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:22,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-11 00:43:22,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:43:22,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:22,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:23,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 153 [2022-02-11 00:43:23,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-02-11 00:43:23,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 122 [2022-02-11 00:43:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:23,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:23,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-02-11 00:43:23,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:23,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 186 [2022-02-11 00:43:23,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 157 [2022-02-11 00:43:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:24,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440305180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:24,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:24,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:43:24,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836857183] [2022-02-11 00:43:24,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:24,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:43:24,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:43:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:43:24,211 INFO L87 Difference]: Start difference. First operand 3895 states and 15459 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:26,505 INFO L93 Difference]: Finished difference Result 6058 states and 22091 transitions. [2022-02-11 00:43:26,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 00:43:26,505 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:26,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:26,517 INFO L225 Difference]: With dead ends: 6058 [2022-02-11 00:43:26,517 INFO L226 Difference]: Without dead ends: 5795 [2022-02-11 00:43:26,517 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=633, Invalid=7377, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 00:43:26,517 INFO L934 BasicCegarLoop]: 66 mSDtfsCounter, 252 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 4110 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 4211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:26,518 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1125 Invalid, 4211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4110 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:43:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2022-02-11 00:43:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 3953. [2022-02-11 00:43:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 3.98836032388664) internal successors, (15762), 3952 states have internal predecessors, (15762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 15762 transitions. [2022-02-11 00:43:26,586 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 15762 transitions. Word has length 23 [2022-02-11 00:43:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:26,586 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 15762 transitions. [2022-02-11 00:43:26,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 15762 transitions. [2022-02-11 00:43:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:26,592 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:26,592 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:26,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-02-11 00:43:26,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:26,807 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1699320593, now seen corresponding path program 323 times [2022-02-11 00:43:26,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:26,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139882585] [2022-02-11 00:43:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:26,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:26,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:26,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139882585] [2022-02-11 00:43:26,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139882585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:26,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182767711] [2022-02-11 00:43:26,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:43:26,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:26,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:26,889 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:26,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-11 00:43:27,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:43:27,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:27,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 182 [2022-02-11 00:43:27,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:43:27,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 132 [2022-02-11 00:43:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:27,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:27,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:43:28,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-11 00:43:28,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:28,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 198 [2022-02-11 00:43:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:28,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182767711] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:28,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:28,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:43:28,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544912350] [2022-02-11 00:43:28,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:28,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:43:28,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:43:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:43:28,265 INFO L87 Difference]: Start difference. First operand 3953 states and 15762 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:32,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:32,831 INFO L93 Difference]: Finished difference Result 7219 states and 25862 transitions. [2022-02-11 00:43:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-11 00:43:32,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:32,846 INFO L225 Difference]: With dead ends: 7219 [2022-02-11 00:43:32,846 INFO L226 Difference]: Without dead ends: 6877 [2022-02-11 00:43:32,848 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5572 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1289, Invalid=14967, Unknown=0, NotChecked=0, Total=16256 [2022-02-11 00:43:32,848 INFO L934 BasicCegarLoop]: 80 mSDtfsCounter, 407 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 4181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:32,848 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1328 Invalid, 4181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3970 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:43:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6877 states. [2022-02-11 00:43:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6877 to 4089. [2022-02-11 00:43:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 4088 states have (on average 4.018101761252447) internal successors, (16426), 4088 states have internal predecessors, (16426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 16426 transitions. [2022-02-11 00:43:32,939 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 16426 transitions. Word has length 23 [2022-02-11 00:43:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:32,939 INFO L470 AbstractCegarLoop]: Abstraction has 4089 states and 16426 transitions. [2022-02-11 00:43:32,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 16426 transitions. [2022-02-11 00:43:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:32,946 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:32,947 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:32,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:33,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:33,164 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1968406823, now seen corresponding path program 324 times [2022-02-11 00:43:33,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:33,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010418359] [2022-02-11 00:43:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:33,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:33,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010418359] [2022-02-11 00:43:33,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010418359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:33,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964129443] [2022-02-11 00:43:33,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:43:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:33,288 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:33,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-11 00:43:33,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:43:33,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:33,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:33,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:33,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 182 [2022-02-11 00:43:34,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:43:34,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 124 [2022-02-11 00:43:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:34,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:34,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:43:34,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:34,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 302 [2022-02-11 00:43:34,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 249 [2022-02-11 00:43:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:34,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964129443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:34,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:34,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:43:34,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431975803] [2022-02-11 00:43:34,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:34,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:43:34,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:43:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:43:34,905 INFO L87 Difference]: Start difference. First operand 4089 states and 16426 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:37,843 INFO L93 Difference]: Finished difference Result 6393 states and 23359 transitions. [2022-02-11 00:43:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-11 00:43:37,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:37,856 INFO L225 Difference]: With dead ends: 6393 [2022-02-11 00:43:37,856 INFO L226 Difference]: Without dead ends: 6116 [2022-02-11 00:43:37,857 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=859, Invalid=10483, Unknown=0, NotChecked=0, Total=11342 [2022-02-11 00:43:37,857 INFO L934 BasicCegarLoop]: 81 mSDtfsCounter, 271 mSDsluCounter, 2648 mSDsCounter, 0 mSdLazyCounter, 4283 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 4408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 4283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:37,857 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1414 Invalid, 4408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 4283 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:43:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2022-02-11 00:43:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 3966. [2022-02-11 00:43:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3966 states, 3965 states have (on average 3.994199243379571) internal successors, (15837), 3965 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3966 states to 3966 states and 15837 transitions. [2022-02-11 00:43:37,934 INFO L78 Accepts]: Start accepts. Automaton has 3966 states and 15837 transitions. Word has length 23 [2022-02-11 00:43:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:37,934 INFO L470 AbstractCegarLoop]: Abstraction has 3966 states and 15837 transitions. [2022-02-11 00:43:37,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3966 states and 15837 transitions. [2022-02-11 00:43:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:37,940 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:37,940 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:37,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-02-11 00:43:38,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-02-11 00:43:38,153 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:38,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1005082803, now seen corresponding path program 325 times [2022-02-11 00:43:38,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:38,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440595192] [2022-02-11 00:43:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:43:38,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:38,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440595192] [2022-02-11 00:43:38,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440595192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:38,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663622816] [2022-02-11 00:43:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:43:38,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:38,233 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:38,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-11 00:43:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:38,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:43:38,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-02-11 00:43:39,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 145 [2022-02-11 00:43:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:43:39,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:39,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 276 [2022-02-11 00:43:39,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 182 [2022-02-11 00:43:39,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:39,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 181 [2022-02-11 00:43:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:43:39,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663622816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:39,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:39,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:43:39,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551573584] [2022-02-11 00:43:39,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:39,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:43:39,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:39,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:43:39,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:43:39,886 INFO L87 Difference]: Start difference. First operand 3966 states and 15837 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:43,377 INFO L93 Difference]: Finished difference Result 6659 states and 24238 transitions. [2022-02-11 00:43:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-11 00:43:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:43,389 INFO L225 Difference]: With dead ends: 6659 [2022-02-11 00:43:43,389 INFO L226 Difference]: Without dead ends: 6342 [2022-02-11 00:43:43,391 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1090, Invalid=12020, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 00:43:43,391 INFO L934 BasicCegarLoop]: 68 mSDtfsCounter, 325 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 4134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:43,391 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1227 Invalid, 4134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3974 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:43:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-02-11 00:43:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 4023. [2022-02-11 00:43:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4023 states, 4022 states have (on average 4.0) internal successors, (16088), 4022 states have internal predecessors, (16088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4023 states to 4023 states and 16088 transitions. [2022-02-11 00:43:43,461 INFO L78 Accepts]: Start accepts. Automaton has 4023 states and 16088 transitions. Word has length 23 [2022-02-11 00:43:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:43,461 INFO L470 AbstractCegarLoop]: Abstraction has 4023 states and 16088 transitions. [2022-02-11 00:43:43,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:43,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4023 states and 16088 transitions. [2022-02-11 00:43:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:43,467 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:43,467 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:43,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:43,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:43,683 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1896560969, now seen corresponding path program 326 times [2022-02-11 00:43:43,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:43,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426102734] [2022-02-11 00:43:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:43,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:43,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:43,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426102734] [2022-02-11 00:43:43,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426102734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:43,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910379049] [2022-02-11 00:43:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:43,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:43,797 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:43,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-11 00:43:44,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:44,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:44,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:44,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:44,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 199 [2022-02-11 00:43:44,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-02-11 00:43:44,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:44,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-02-11 00:43:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:45,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 263 [2022-02-11 00:43:45,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:45,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 190 [2022-02-11 00:43:45,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:43:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910379049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:45,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:45,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-11 00:43:45,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508637061] [2022-02-11 00:43:45,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:45,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:43:45,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:45,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:43:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:43:45,569 INFO L87 Difference]: Start difference. First operand 4023 states and 16088 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:45,955 INFO L93 Difference]: Finished difference Result 4708 states and 18305 transitions. [2022-02-11 00:43:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-11 00:43:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:45,965 INFO L225 Difference]: With dead ends: 4708 [2022-02-11 00:43:45,965 INFO L226 Difference]: Without dead ends: 4641 [2022-02-11 00:43:45,965 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:43:45,965 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:45,965 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 243 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 620 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-02-11 00:43:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2022-02-11 00:43:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4049. [2022-02-11 00:43:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4049 states, 4048 states have (on average 3.998764822134387) internal successors, (16187), 4048 states have internal predecessors, (16187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 16187 transitions. [2022-02-11 00:43:46,023 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 16187 transitions. Word has length 23 [2022-02-11 00:43:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:46,023 INFO L470 AbstractCegarLoop]: Abstraction has 4049 states and 16187 transitions. [2022-02-11 00:43:46,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 16187 transitions. [2022-02-11 00:43:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:46,029 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:46,029 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:46,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:46,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-02-11 00:43:46,243 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash 708463423, now seen corresponding path program 327 times [2022-02-11 00:43:46,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:46,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70108883] [2022-02-11 00:43:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:46,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:46,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70108883] [2022-02-11 00:43:46,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70108883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:46,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609582877] [2022-02-11 00:43:46,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:43:46,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:46,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:46,488 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:46,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-11 00:43:46,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:43:46,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:46,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 163 [2022-02-11 00:43:47,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 178 [2022-02-11 00:43:47,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:47,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 182 [2022-02-11 00:43:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:47,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:47,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 126 [2022-02-11 00:43:47,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:43:47,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:47,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 163 [2022-02-11 00:43:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:48,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609582877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:48,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:48,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-02-11 00:43:48,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570137974] [2022-02-11 00:43:48,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:48,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:43:48,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:43:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:43:48,188 INFO L87 Difference]: Start difference. First operand 4049 states and 16187 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:49,639 INFO L93 Difference]: Finished difference Result 4870 states and 18767 transitions. [2022-02-11 00:43:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:43:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:49,649 INFO L225 Difference]: With dead ends: 4870 [2022-02-11 00:43:49,649 INFO L226 Difference]: Without dead ends: 4798 [2022-02-11 00:43:49,650 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=236, Invalid=2116, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:43:49,650 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 139 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:49,650 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 524 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1344 Invalid, 0 Unknown, 534 Unchecked, 0.5s Time] [2022-02-11 00:43:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2022-02-11 00:43:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4047. [2022-02-11 00:43:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 4.002718734552644) internal successors, (16195), 4046 states have internal predecessors, (16195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 16195 transitions. [2022-02-11 00:43:49,716 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 16195 transitions. Word has length 23 [2022-02-11 00:43:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:49,716 INFO L470 AbstractCegarLoop]: Abstraction has 4047 states and 16195 transitions. [2022-02-11 00:43:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 16195 transitions. [2022-02-11 00:43:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:49,722 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:49,722 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:49,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-02-11 00:43:49,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-02-11 00:43:49,939 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash 897910989, now seen corresponding path program 328 times [2022-02-11 00:43:49,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:49,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8919093] [2022-02-11 00:43:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:50,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:50,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8919093] [2022-02-11 00:43:50,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8919093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:50,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083221900] [2022-02-11 00:43:50,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:43:50,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:50,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:50,044 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:50,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-11 00:43:50,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:43:50,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:50,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:43:50,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:43:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:50,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-02-11 00:43:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:51,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:51,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 356 treesize of output 320 [2022-02-11 00:43:51,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:51,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 234 [2022-02-11 00:43:51,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2022-02-11 00:43:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:51,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083221900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:51,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:51,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:43:51,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351394217] [2022-02-11 00:43:51,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:51,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:43:51,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:43:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:43:51,870 INFO L87 Difference]: Start difference. First operand 4047 states and 16195 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:52,058 INFO L93 Difference]: Finished difference Result 4675 states and 18211 transitions. [2022-02-11 00:43:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:43:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:52,067 INFO L225 Difference]: With dead ends: 4675 [2022-02-11 00:43:52,067 INFO L226 Difference]: Without dead ends: 4630 [2022-02-11 00:43:52,068 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:43:52,068 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:52,068 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 198 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 534 Invalid, 0 Unknown, 207 Unchecked, 0.1s Time] [2022-02-11 00:43:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2022-02-11 00:43:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 4014. [2022-02-11 00:43:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 3.9997508098679293) internal successors, (16051), 4013 states have internal predecessors, (16051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 16051 transitions. [2022-02-11 00:43:52,126 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 16051 transitions. Word has length 23 [2022-02-11 00:43:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:52,127 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 16051 transitions. [2022-02-11 00:43:52,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 16051 transitions. [2022-02-11 00:43:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:52,133 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:52,133 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:52,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:52,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-02-11 00:43:52,348 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1797170175, now seen corresponding path program 329 times [2022-02-11 00:43:52,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:52,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134177368] [2022-02-11 00:43:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:52,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:52,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:52,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134177368] [2022-02-11 00:43:52,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134177368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:52,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48371311] [2022-02-11 00:43:52,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:43:52,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:52,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:52,484 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:52,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-11 00:43:52,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:43:52,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:43:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:53,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 254 [2022-02-11 00:43:53,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:53,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 177 [2022-02-11 00:43:53,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 130 [2022-02-11 00:43:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:53,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:53,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-02-11 00:43:53,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:43:53,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:53,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 140 [2022-02-11 00:43:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:54,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48371311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:54,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:54,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-11 00:43:54,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147829095] [2022-02-11 00:43:54,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:54,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:43:54,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:54,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:43:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:43:54,120 INFO L87 Difference]: Start difference. First operand 4014 states and 16051 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:54,785 INFO L93 Difference]: Finished difference Result 5197 states and 20041 transitions. [2022-02-11 00:43:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:43:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:43:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:54,796 INFO L225 Difference]: With dead ends: 5197 [2022-02-11 00:43:54,796 INFO L226 Difference]: Without dead ends: 5024 [2022-02-11 00:43:54,796 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:43:54,796 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 215 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:54,796 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 277 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 753 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-02-11 00:43:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2022-02-11 00:43:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 4139. [2022-02-11 00:43:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 4.036732721121314) internal successors, (16704), 4138 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 16704 transitions. [2022-02-11 00:43:54,894 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 16704 transitions. Word has length 23 [2022-02-11 00:43:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:54,894 INFO L470 AbstractCegarLoop]: Abstraction has 4139 states and 16704 transitions. [2022-02-11 00:43:54,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 16704 transitions. [2022-02-11 00:43:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:43:54,901 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:54,901 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:54,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:55,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:55,115 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:43:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:55,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1154064981, now seen corresponding path program 330 times [2022-02-11 00:43:55,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:55,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749767664] [2022-02-11 00:43:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:55,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:55,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749767664] [2022-02-11 00:43:55,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749767664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:55,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48006453] [2022-02-11 00:43:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:43:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:55,238 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:43:55,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-11 00:43:55,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:43:55,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-11 00:43:55,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:55,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-02-11 00:43:55,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 229 [2022-02-11 00:43:55,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:43:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:56,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:56,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 228 [2022-02-11 00:43:56,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:56,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 202 [2022-02-11 00:43:56,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 153 [2022-02-11 00:43:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:43:56,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48006453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:56,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:56,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 00:43:56,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64346402] [2022-02-11 00:43:56,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:56,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:43:56,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:43:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:43:56,917 INFO L87 Difference]: Start difference. First operand 4139 states and 16704 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:00,404 INFO L93 Difference]: Finished difference Result 6355 states and 23374 transitions. [2022-02-11 00:44:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 00:44:00,405 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:44:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:00,417 INFO L225 Difference]: With dead ends: 6355 [2022-02-11 00:44:00,417 INFO L226 Difference]: Without dead ends: 6015 [2022-02-11 00:44:00,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=811, Invalid=6671, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 00:44:00,418 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 416 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:00,418 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 725 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:44:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2022-02-11 00:44:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 4198. [2022-02-11 00:44:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4197 states have (on average 4.047891350964975) internal successors, (16989), 4197 states have internal predecessors, (16989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 16989 transitions. [2022-02-11 00:44:00,493 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 16989 transitions. Word has length 23 [2022-02-11 00:44:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:00,493 INFO L470 AbstractCegarLoop]: Abstraction has 4198 states and 16989 transitions. [2022-02-11 00:44:00,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 16989 transitions. [2022-02-11 00:44:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 00:44:00,499 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:00,499 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:00,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-02-11 00:44:00,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:00,715 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash 119936981, now seen corresponding path program 331 times [2022-02-11 00:44:00,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:00,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340611205] [2022-02-11 00:44:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:00,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:00,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340611205] [2022-02-11 00:44:00,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340611205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:00,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119974716] [2022-02-11 00:44:00,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:00,829 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:00,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-11 00:44:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:01,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:44:01,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:01,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 233 [2022-02-11 00:44:01,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-02-11 00:44:01,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 176 [2022-02-11 00:44:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:01,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:01,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-02-11 00:44:02,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:02,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 265 treesize of output 235 [2022-02-11 00:44:02,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 194 [2022-02-11 00:44:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:02,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119974716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:02,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:02,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-02-11 00:44:02,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39713470] [2022-02-11 00:44:02,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:02,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:44:02,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:44:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:44:02,371 INFO L87 Difference]: Start difference. First operand 4198 states and 16989 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:05,546 INFO L93 Difference]: Finished difference Result 5965 states and 22141 transitions. [2022-02-11 00:44:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-11 00:44:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-11 00:44:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:05,558 INFO L225 Difference]: With dead ends: 5965 [2022-02-11 00:44:05,558 INFO L226 Difference]: Without dead ends: 5772 [2022-02-11 00:44:05,558 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=992, Invalid=10350, Unknown=0, NotChecked=0, Total=11342 [2022-02-11 00:44:05,558 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 361 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:05,558 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 880 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:44:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2022-02-11 00:44:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4109. [2022-02-11 00:44:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 4.05111976630964) internal successors, (16642), 4108 states have internal predecessors, (16642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 16642 transitions. [2022-02-11 00:44:05,627 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 16642 transitions. Word has length 23 [2022-02-11 00:44:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:05,627 INFO L470 AbstractCegarLoop]: Abstraction has 4109 states and 16642 transitions. [2022-02-11 00:44:05,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 16642 transitions. [2022-02-11 00:44:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:05,633 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:05,633 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:05,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:05,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:05,850 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash -868338267, now seen corresponding path program 332 times [2022-02-11 00:44:05,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:05,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959621384] [2022-02-11 00:44:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:05,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:05,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:05,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959621384] [2022-02-11 00:44:05,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959621384] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:05,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369539466] [2022-02-11 00:44:05,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:05,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:05,909 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:05,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-11 00:44:06,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:06,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:06,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:06,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:06,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:44:06,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:44:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:06,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:06,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:44:06,824 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:06,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:44:06,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:06,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369539466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:06,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:06,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2022-02-11 00:44:06,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902186463] [2022-02-11 00:44:06,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:06,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-11 00:44:06,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-11 00:44:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:44:06,833 INFO L87 Difference]: Start difference. First operand 4109 states and 16642 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:07,172 INFO L93 Difference]: Finished difference Result 4745 states and 18761 transitions. [2022-02-11 00:44:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:44:07,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:07,182 INFO L225 Difference]: With dead ends: 4745 [2022-02-11 00:44:07,182 INFO L226 Difference]: Without dead ends: 4648 [2022-02-11 00:44:07,182 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:44:07,183 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 119 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:07,183 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 261 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:44:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2022-02-11 00:44:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4121. [2022-02-11 00:44:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4121 states, 4120 states have (on average 4.059223300970873) internal successors, (16724), 4120 states have internal predecessors, (16724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 16724 transitions. [2022-02-11 00:44:07,251 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 16724 transitions. Word has length 24 [2022-02-11 00:44:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:07,251 INFO L470 AbstractCegarLoop]: Abstraction has 4121 states and 16724 transitions. [2022-02-11 00:44:07,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 16724 transitions. [2022-02-11 00:44:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:07,258 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:07,258 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:07,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:07,476 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1930997963, now seen corresponding path program 333 times [2022-02-11 00:44:07,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:07,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664653894] [2022-02-11 00:44:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:07,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:07,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:07,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664653894] [2022-02-11 00:44:07,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664653894] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:07,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395770875] [2022-02-11 00:44:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:07,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:07,542 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:07,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-11 00:44:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:07,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:08,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:44:08,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:44:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:08,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:08,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:44:08,497 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:08,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:44:08,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:08,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395770875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:08,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:08,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2022-02-11 00:44:08,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361229097] [2022-02-11 00:44:08,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:08,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-11 00:44:08,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-11 00:44:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:44:08,508 INFO L87 Difference]: Start difference. First operand 4121 states and 16724 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:09,069 INFO L93 Difference]: Finished difference Result 4772 states and 18853 transitions. [2022-02-11 00:44:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:44:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:09,079 INFO L225 Difference]: With dead ends: 4772 [2022-02-11 00:44:09,079 INFO L226 Difference]: Without dead ends: 4675 [2022-02-11 00:44:09,080 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:44:09,080 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 120 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:09,080 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 290 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:44:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2022-02-11 00:44:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4142. [2022-02-11 00:44:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 4141 states have (on average 4.05964742815745) internal successors, (16811), 4141 states have internal predecessors, (16811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 16811 transitions. [2022-02-11 00:44:09,142 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 16811 transitions. Word has length 24 [2022-02-11 00:44:09,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:09,143 INFO L470 AbstractCegarLoop]: Abstraction has 4142 states and 16811 transitions. [2022-02-11 00:44:09,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 16811 transitions. [2022-02-11 00:44:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:09,149 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:09,149 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:09,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-02-11 00:44:09,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:09,350 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash 149473633, now seen corresponding path program 334 times [2022-02-11 00:44:09,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:09,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202687717] [2022-02-11 00:44:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:09,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:09,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202687717] [2022-02-11 00:44:09,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202687717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:09,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923380682] [2022-02-11 00:44:09,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:09,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:09,448 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:09,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-11 00:44:09,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:09,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:09,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:09,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:44:09,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:44:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:10,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:10,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-02-11 00:44:10,381 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:10,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:44:10,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:10,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923380682] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:10,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:10,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-02-11 00:44:10,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657616994] [2022-02-11 00:44:10,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:10,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:44:10,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:44:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:10,395 INFO L87 Difference]: Start difference. First operand 4142 states and 16811 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:10,874 INFO L93 Difference]: Finished difference Result 4815 states and 18990 transitions. [2022-02-11 00:44:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:44:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:10,884 INFO L225 Difference]: With dead ends: 4815 [2022-02-11 00:44:10,885 INFO L226 Difference]: Without dead ends: 4722 [2022-02-11 00:44:10,885 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:44:10,885 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 122 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:10,885 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 302 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:44:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2022-02-11 00:44:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 4169. [2022-02-11 00:44:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4168 states have (on average 4.061180422264875) internal successors, (16927), 4168 states have internal predecessors, (16927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 16927 transitions. [2022-02-11 00:44:10,955 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 16927 transitions. Word has length 24 [2022-02-11 00:44:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:10,955 INFO L470 AbstractCegarLoop]: Abstraction has 4169 states and 16927 transitions. [2022-02-11 00:44:10,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 16927 transitions. [2022-02-11 00:44:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:10,985 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:10,985 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:11,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:11,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:11,195 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:11,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1324964277, now seen corresponding path program 335 times [2022-02-11 00:44:11,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:11,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777652918] [2022-02-11 00:44:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:11,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:11,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:11,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777652918] [2022-02-11 00:44:11,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777652918] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:11,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624795582] [2022-02-11 00:44:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:11,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:11,300 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:11,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-11 00:44:11,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:44:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:11,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:11,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:11,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:11,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 186 [2022-02-11 00:44:11,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-02-11 00:44:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:12,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:12,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-02-11 00:44:12,423 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:12,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:44:12,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:12,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624795582] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:12,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:12,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-02-11 00:44:12,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266277936] [2022-02-11 00:44:12,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:12,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:44:12,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:44:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:44:12,438 INFO L87 Difference]: Start difference. First operand 4169 states and 16927 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:13,001 INFO L93 Difference]: Finished difference Result 5081 states and 19802 transitions. [2022-02-11 00:44:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:44:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:13,011 INFO L225 Difference]: With dead ends: 5081 [2022-02-11 00:44:13,011 INFO L226 Difference]: Without dead ends: 4988 [2022-02-11 00:44:13,012 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:44:13,012 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:13,012 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 306 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:44:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2022-02-11 00:44:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4130. [2022-02-11 00:44:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 4129 states have (on average 4.056672317752483) internal successors, (16750), 4129 states have internal predecessors, (16750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 16750 transitions. [2022-02-11 00:44:13,077 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 16750 transitions. Word has length 24 [2022-02-11 00:44:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:13,077 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 16750 transitions. [2022-02-11 00:44:13,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 16750 transitions. [2022-02-11 00:44:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:13,083 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:13,083 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:13,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:13,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:13,290 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1356436285, now seen corresponding path program 336 times [2022-02-11 00:44:13,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:13,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67425017] [2022-02-11 00:44:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:13,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:13,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:13,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67425017] [2022-02-11 00:44:13,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67425017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:13,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799097553] [2022-02-11 00:44:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:13,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:13,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:13,399 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-11 00:44:13,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:44:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:13,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:44:13,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 117 [2022-02-11 00:44:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:14,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:14,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:44:14,513 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:14,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:44:14,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:14,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799097553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:14,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:14,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-02-11 00:44:14,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771147006] [2022-02-11 00:44:14,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:14,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:44:14,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:44:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:14,523 INFO L87 Difference]: Start difference. First operand 4130 states and 16750 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:14,975 INFO L93 Difference]: Finished difference Result 4903 states and 19107 transitions. [2022-02-11 00:44:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-11 00:44:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:14,985 INFO L225 Difference]: With dead ends: 4903 [2022-02-11 00:44:14,985 INFO L226 Difference]: Without dead ends: 4768 [2022-02-11 00:44:14,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:44:14,986 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:14,986 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 343 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:44:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2022-02-11 00:44:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4093. [2022-02-11 00:44:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 4.0442326490713585) internal successors, (16549), 4092 states have internal predecessors, (16549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 16549 transitions. [2022-02-11 00:44:15,048 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 16549 transitions. Word has length 24 [2022-02-11 00:44:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:15,048 INFO L470 AbstractCegarLoop]: Abstraction has 4093 states and 16549 transitions. [2022-02-11 00:44:15,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 16549 transitions. [2022-02-11 00:44:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:15,055 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:15,055 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:15,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-02-11 00:44:15,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-02-11 00:44:15,273 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash 102788877, now seen corresponding path program 337 times [2022-02-11 00:44:15,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:15,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133642990] [2022-02-11 00:44:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:44:15,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:15,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133642990] [2022-02-11 00:44:15,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133642990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:15,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589331497] [2022-02-11 00:44:15,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:15,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:15,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:15,411 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:15,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-11 00:44:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:15,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:44:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:15,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-11 00:44:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:15,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:16,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-02-11 00:44:16,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:16,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-11 00:44:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:16,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589331497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:16,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:16,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 00:44:16,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142101631] [2022-02-11 00:44:16,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:16,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:44:16,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:44:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:44:16,201 INFO L87 Difference]: Start difference. First operand 4093 states and 16549 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:19,107 INFO L93 Difference]: Finished difference Result 8150 states and 30355 transitions. [2022-02-11 00:44:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-11 00:44:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:19,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:19,124 INFO L225 Difference]: With dead ends: 8150 [2022-02-11 00:44:19,124 INFO L226 Difference]: Without dead ends: 7734 [2022-02-11 00:44:19,125 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1109, Invalid=11547, Unknown=0, NotChecked=0, Total=12656 [2022-02-11 00:44:19,126 INFO L934 BasicCegarLoop]: 74 mSDtfsCounter, 471 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:19,126 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1043 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:44:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2022-02-11 00:44:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 4574. [2022-02-11 00:44:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.067789197463372) internal successors, (18602), 4573 states have internal predecessors, (18602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 18602 transitions. [2022-02-11 00:44:19,222 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 18602 transitions. Word has length 24 [2022-02-11 00:44:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:19,222 INFO L470 AbstractCegarLoop]: Abstraction has 4574 states and 18602 transitions. [2022-02-11 00:44:19,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 18602 transitions. [2022-02-11 00:44:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:19,229 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:19,229 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:19,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:19,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-02-11 00:44:19,443 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash 601935470, now seen corresponding path program 338 times [2022-02-11 00:44:19,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:19,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867960294] [2022-02-11 00:44:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:19,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:19,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:19,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867960294] [2022-02-11 00:44:19,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867960294] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:19,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499139739] [2022-02-11 00:44:19,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:19,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:19,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:19,523 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:19,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-11 00:44:19,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:19,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:20,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 213 [2022-02-11 00:44:20,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:20,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-02-11 00:44:20,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:20,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:20,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:20,716 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:20,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-02-11 00:44:20,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:44:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:20,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499139739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:20,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:20,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:44:20,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769365940] [2022-02-11 00:44:20,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:20,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:44:20,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:44:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:44:20,872 INFO L87 Difference]: Start difference. First operand 4574 states and 18602 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:21,101 INFO L93 Difference]: Finished difference Result 5600 states and 22475 transitions. [2022-02-11 00:44:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:44:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:21,113 INFO L225 Difference]: With dead ends: 5600 [2022-02-11 00:44:21,114 INFO L226 Difference]: Without dead ends: 5490 [2022-02-11 00:44:21,114 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:44:21,114 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 192 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:21,114 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 175 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 397 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-02-11 00:44:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2022-02-11 00:44:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 4576. [2022-02-11 00:44:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.060109289617486) internal successors, (18575), 4575 states have internal predecessors, (18575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18575 transitions. [2022-02-11 00:44:21,190 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18575 transitions. Word has length 24 [2022-02-11 00:44:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:21,190 INFO L470 AbstractCegarLoop]: Abstraction has 4576 states and 18575 transitions. [2022-02-11 00:44:21,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18575 transitions. [2022-02-11 00:44:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:21,197 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:21,197 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:21,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:21,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-02-11 00:44:21,415 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:21,415 INFO L85 PathProgramCache]: Analyzing trace with hash -13157717, now seen corresponding path program 339 times [2022-02-11 00:44:21,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:21,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844958584] [2022-02-11 00:44:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:21,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:21,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:21,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844958584] [2022-02-11 00:44:21,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844958584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:21,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82628218] [2022-02-11 00:44:21,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:21,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:21,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:21,503 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:21,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-11 00:44:21,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:44:21,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:44:21,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:22,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 310 [2022-02-11 00:44:22,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-11 00:44:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:22,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:22,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 173 [2022-02-11 00:44:22,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:44:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:22,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82628218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:22,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:22,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 00:44:22,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207468085] [2022-02-11 00:44:22,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:22,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:44:22,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:44:22,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:44:22,703 INFO L87 Difference]: Start difference. First operand 4576 states and 18575 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:25,926 INFO L93 Difference]: Finished difference Result 8274 states and 30374 transitions. [2022-02-11 00:44:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-11 00:44:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:25,942 INFO L225 Difference]: With dead ends: 8274 [2022-02-11 00:44:25,942 INFO L226 Difference]: Without dead ends: 7692 [2022-02-11 00:44:25,943 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4629 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1147, Invalid=12659, Unknown=0, NotChecked=0, Total=13806 [2022-02-11 00:44:25,944 INFO L934 BasicCegarLoop]: 71 mSDtfsCounter, 465 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 3712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:25,944 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 1117 Invalid, 3712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3501 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:44:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7692 states. [2022-02-11 00:44:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7692 to 5086. [2022-02-11 00:44:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 5085 states have (on average 4.058013765978368) internal successors, (20635), 5085 states have internal predecessors, (20635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 20635 transitions. [2022-02-11 00:44:26,047 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 20635 transitions. Word has length 24 [2022-02-11 00:44:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:26,048 INFO L470 AbstractCegarLoop]: Abstraction has 5086 states and 20635 transitions. [2022-02-11 00:44:26,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 20635 transitions. [2022-02-11 00:44:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:26,056 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:26,056 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:26,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:26,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:26,274 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:26,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1331940599, now seen corresponding path program 340 times [2022-02-11 00:44:26,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:26,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102798744] [2022-02-11 00:44:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:26,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:26,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:26,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102798744] [2022-02-11 00:44:26,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102798744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:26,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956544426] [2022-02-11 00:44:26,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:26,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:26,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:26,365 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:26,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-11 00:44:26,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:44:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:26,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-11 00:44:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:26,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:27,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-02-11 00:44:27,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:27,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:44:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:27,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956544426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:27,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:27,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-02-11 00:44:27,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272326383] [2022-02-11 00:44:27,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:27,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:44:27,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:44:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:44:27,204 INFO L87 Difference]: Start difference. First operand 5086 states and 20635 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:28,270 INFO L93 Difference]: Finished difference Result 6698 states and 26157 transitions. [2022-02-11 00:44:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:44:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:28,284 INFO L225 Difference]: With dead ends: 6698 [2022-02-11 00:44:28,285 INFO L226 Difference]: Without dead ends: 6468 [2022-02-11 00:44:28,285 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=426, Invalid=3356, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:44:28,285 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 186 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:28,285 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 567 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:44:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2022-02-11 00:44:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 5369. [2022-02-11 00:44:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 5368 states have (on average 4.046385991058123) internal successors, (21721), 5368 states have internal predecessors, (21721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 21721 transitions. [2022-02-11 00:44:28,375 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 21721 transitions. Word has length 24 [2022-02-11 00:44:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:28,375 INFO L470 AbstractCegarLoop]: Abstraction has 5369 states and 21721 transitions. [2022-02-11 00:44:28,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 21721 transitions. [2022-02-11 00:44:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:28,384 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:28,384 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:28,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:28,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-02-11 00:44:28,601 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash 538136127, now seen corresponding path program 341 times [2022-02-11 00:44:28,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:28,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023564793] [2022-02-11 00:44:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 00:44:28,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:28,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023564793] [2022-02-11 00:44:28,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023564793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:28,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594185] [2022-02-11 00:44:28,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:28,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:28,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:28,691 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:28,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-11 00:44:29,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:44:29,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:29,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:44:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:29,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 253 [2022-02-11 00:44:29,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 233 [2022-02-11 00:44:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:29,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:29,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-02-11 00:44:29,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:29,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:44:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:29,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:29,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:29,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 00:44:29,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122536913] [2022-02-11 00:44:29,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:29,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:44:29,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:44:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:44:29,824 INFO L87 Difference]: Start difference. First operand 5369 states and 21721 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:33,355 INFO L93 Difference]: Finished difference Result 9607 states and 35774 transitions. [2022-02-11 00:44:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-11 00:44:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:33,377 INFO L225 Difference]: With dead ends: 9607 [2022-02-11 00:44:33,377 INFO L226 Difference]: Without dead ends: 8856 [2022-02-11 00:44:33,379 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4477 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1180, Invalid=12626, Unknown=0, NotChecked=0, Total=13806 [2022-02-11 00:44:33,379 INFO L934 BasicCegarLoop]: 88 mSDtfsCounter, 489 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 3872 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:33,379 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 1278 Invalid, 4078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3872 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:44:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2022-02-11 00:44:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 5819. [2022-02-11 00:44:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5818 states have (on average 4.121519422481953) internal successors, (23979), 5818 states have internal predecessors, (23979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 23979 transitions. [2022-02-11 00:44:33,521 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 23979 transitions. Word has length 24 [2022-02-11 00:44:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:33,521 INFO L470 AbstractCegarLoop]: Abstraction has 5819 states and 23979 transitions. [2022-02-11 00:44:33,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 23979 transitions. [2022-02-11 00:44:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:33,530 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:33,530 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:33,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:33,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-02-11 00:44:33,735 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash -833212691, now seen corresponding path program 342 times [2022-02-11 00:44:33,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:33,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318732552] [2022-02-11 00:44:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:33,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:33,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:33,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318732552] [2022-02-11 00:44:33,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318732552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:33,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925089833] [2022-02-11 00:44:33,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:33,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:33,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:33,798 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:33,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-11 00:44:34,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:44:34,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:44:34,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:34,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2022-02-11 00:44:35,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:35,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 273 [2022-02-11 00:44:35,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-02-11 00:44:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 00:44:35,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:35,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-02-11 00:44:36,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 277 [2022-02-11 00:44:36,088 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:36,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 249 [2022-02-11 00:44:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 00:44:36,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925089833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:36,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:36,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-11 00:44:36,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702206505] [2022-02-11 00:44:36,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:36,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:44:36,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:44:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:44:36,309 INFO L87 Difference]: Start difference. First operand 5819 states and 23979 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:37,965 INFO L93 Difference]: Finished difference Result 9121 states and 35756 transitions. [2022-02-11 00:44:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 00:44:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:37,985 INFO L225 Difference]: With dead ends: 9121 [2022-02-11 00:44:37,986 INFO L226 Difference]: Without dead ends: 9064 [2022-02-11 00:44:37,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=713, Invalid=8029, Unknown=0, NotChecked=0, Total=8742 [2022-02-11 00:44:37,987 INFO L934 BasicCegarLoop]: 91 mSDtfsCounter, 198 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 4650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:37,987 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1453 Invalid, 4650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2494 Invalid, 0 Unknown, 2105 Unchecked, 0.6s Time] [2022-02-11 00:44:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2022-02-11 00:44:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 5807. [2022-02-11 00:44:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 4.123492938339648) internal successors, (23941), 5806 states have internal predecessors, (23941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 23941 transitions. [2022-02-11 00:44:38,109 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 23941 transitions. Word has length 24 [2022-02-11 00:44:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:38,109 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 23941 transitions. [2022-02-11 00:44:38,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 23941 transitions. [2022-02-11 00:44:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:38,118 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:38,118 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:38,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-02-11 00:44:38,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:38,331 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1622692589, now seen corresponding path program 343 times [2022-02-11 00:44:38,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:38,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486988052] [2022-02-11 00:44:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:38,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:38,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486988052] [2022-02-11 00:44:38,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486988052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:38,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933815497] [2022-02-11 00:44:38,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:38,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:38,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:38,421 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:38,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-11 00:44:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 00:44:38,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:38,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-11 00:44:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:38,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:39,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-02-11 00:44:39,174 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:39,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-02-11 00:44:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:39,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933815497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:39,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:39,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-02-11 00:44:39,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876106374] [2022-02-11 00:44:39,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:39,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:44:39,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:39,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:44:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:44:39,184 INFO L87 Difference]: Start difference. First operand 5807 states and 23941 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:42,147 INFO L93 Difference]: Finished difference Result 8041 states and 31182 transitions. [2022-02-11 00:44:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-11 00:44:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:42,164 INFO L225 Difference]: With dead ends: 8041 [2022-02-11 00:44:42,164 INFO L226 Difference]: Without dead ends: 7851 [2022-02-11 00:44:42,165 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1034, Invalid=7896, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 00:44:42,165 INFO L934 BasicCegarLoop]: 87 mSDtfsCounter, 257 mSDsluCounter, 2671 mSDsCounter, 0 mSdLazyCounter, 4269 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 4370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:42,165 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1275 Invalid, 4370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4269 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:44:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2022-02-11 00:44:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5711. [2022-02-11 00:44:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5710 states have (on average 4.149036777583188) internal successors, (23691), 5710 states have internal predecessors, (23691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 23691 transitions. [2022-02-11 00:44:42,274 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 23691 transitions. Word has length 24 [2022-02-11 00:44:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:42,274 INFO L470 AbstractCegarLoop]: Abstraction has 5711 states and 23691 transitions. [2022-02-11 00:44:42,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 23691 transitions. [2022-02-11 00:44:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:42,283 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:42,283 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:42,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:42,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:42,485 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:42,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1225987054, now seen corresponding path program 344 times [2022-02-11 00:44:42,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:42,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116851282] [2022-02-11 00:44:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:42,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:42,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116851282] [2022-02-11 00:44:42,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116851282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:42,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187594588] [2022-02-11 00:44:42,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:42,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:42,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:42,597 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:42,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-11 00:44:42,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:42,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:43,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 188 [2022-02-11 00:44:43,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:43,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 00:44:43,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:43,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:43,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:43,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-02-11 00:44:43,746 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:43,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2022-02-11 00:44:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:43,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187594588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:43,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:43,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:44:43,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301635365] [2022-02-11 00:44:43,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:43,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:44:43,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:44:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:44:43,851 INFO L87 Difference]: Start difference. First operand 5711 states and 23691 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:44,082 INFO L93 Difference]: Finished difference Result 6771 states and 27535 transitions. [2022-02-11 00:44:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:44:44,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:44,096 INFO L225 Difference]: With dead ends: 6771 [2022-02-11 00:44:44,096 INFO L226 Difference]: Without dead ends: 6694 [2022-02-11 00:44:44,097 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:44:44,097 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:44,097 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 222 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 596 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2022-02-11 00:44:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2022-02-11 00:44:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 5710. [2022-02-11 00:44:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 4.1488877211420565) internal successors, (23686), 5709 states have internal predecessors, (23686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 23686 transitions. [2022-02-11 00:44:44,191 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 23686 transitions. Word has length 24 [2022-02-11 00:44:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:44,191 INFO L470 AbstractCegarLoop]: Abstraction has 5710 states and 23686 transitions. [2022-02-11 00:44:44,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 23686 transitions. [2022-02-11 00:44:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:44,200 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:44,200 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:44,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-02-11 00:44:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:44,415 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -967191730, now seen corresponding path program 345 times [2022-02-11 00:44:44,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:44,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91450847] [2022-02-11 00:44:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:44,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:44,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91450847] [2022-02-11 00:44:44,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91450847] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:44,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330678400] [2022-02-11 00:44:44,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:44,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:44,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:44,528 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:44,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-11 00:44:44,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:44,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:44,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 00:44:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:45,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-02-11 00:44:45,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:44:45,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:45,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:44:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:45,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:45,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:44:46,251 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:46,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 286 [2022-02-11 00:44:46,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 232 [2022-02-11 00:44:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:46,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330678400] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:46,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:46,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-11 00:44:46,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503522839] [2022-02-11 00:44:46,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:46,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:44:46,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:44:46,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:44:46,441 INFO L87 Difference]: Start difference. First operand 5710 states and 23686 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:47,390 INFO L93 Difference]: Finished difference Result 6999 states and 28468 transitions. [2022-02-11 00:44:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:44:47,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:47,406 INFO L225 Difference]: With dead ends: 6999 [2022-02-11 00:44:47,406 INFO L226 Difference]: Without dead ends: 6872 [2022-02-11 00:44:47,406 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=295, Invalid=1867, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:44:47,406 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 160 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:47,406 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 465 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 757 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-02-11 00:44:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2022-02-11 00:44:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 5712. [2022-02-11 00:44:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5712 states, 5711 states have (on average 4.149185781824549) internal successors, (23696), 5711 states have internal predecessors, (23696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5712 states to 5712 states and 23696 transitions. [2022-02-11 00:44:47,505 INFO L78 Accepts]: Start accepts. Automaton has 5712 states and 23696 transitions. Word has length 24 [2022-02-11 00:44:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:47,505 INFO L470 AbstractCegarLoop]: Abstraction has 5712 states and 23696 transitions. [2022-02-11 00:44:47,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5712 states and 23696 transitions. [2022-02-11 00:44:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:47,514 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:47,514 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:47,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:47,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2022-02-11 00:44:47,732 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:47,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2027969820, now seen corresponding path program 346 times [2022-02-11 00:44:47,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:47,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422603938] [2022-02-11 00:44:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:47,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:47,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:47,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422603938] [2022-02-11 00:44:47,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422603938] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:47,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515612250] [2022-02-11 00:44:47,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:47,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:47,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:47,862 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:47,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-11 00:44:48,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:48,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:48,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:48,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-02-11 00:44:48,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:48,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 00:44:48,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:48,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:49,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:49,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 270 [2022-02-11 00:44:49,334 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:49,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 240 [2022-02-11 00:44:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:49,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515612250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:49,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:49,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:44:49,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052904367] [2022-02-11 00:44:49,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:49,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:44:49,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:44:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:44:49,477 INFO L87 Difference]: Start difference. First operand 5712 states and 23696 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:49,631 INFO L93 Difference]: Finished difference Result 6693 states and 27325 transitions. [2022-02-11 00:44:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-11 00:44:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:49,646 INFO L225 Difference]: With dead ends: 6693 [2022-02-11 00:44:49,646 INFO L226 Difference]: Without dead ends: 6602 [2022-02-11 00:44:49,646 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:44:49,646 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:49,646 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 186 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 391 Invalid, 0 Unknown, 190 Unchecked, 0.1s Time] [2022-02-11 00:44:49,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2022-02-11 00:44:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 5710. [2022-02-11 00:44:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 4.1488877211420565) internal successors, (23686), 5709 states have internal predecessors, (23686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 23686 transitions. [2022-02-11 00:44:49,740 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 23686 transitions. Word has length 24 [2022-02-11 00:44:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:49,740 INFO L470 AbstractCegarLoop]: Abstraction has 5710 states and 23686 transitions. [2022-02-11 00:44:49,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 23686 transitions. [2022-02-11 00:44:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:49,749 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:49,749 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:49,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-02-11 00:44:49,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-02-11 00:44:49,963 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1699717928, now seen corresponding path program 347 times [2022-02-11 00:44:49,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:49,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034346940] [2022-02-11 00:44:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:50,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:50,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034346940] [2022-02-11 00:44:50,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034346940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:50,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453946058] [2022-02-11 00:44:50,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:50,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:50,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:50,045 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:50,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-11 00:44:50,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:44:50,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:50,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:50,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:44:50,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:50,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 00:44:50,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:51,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:51,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:51,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-02-11 00:44:51,529 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:44:51,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-02-11 00:44:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:44:51,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453946058] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:51,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:51,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-11 00:44:51,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226827880] [2022-02-11 00:44:51,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:51,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:44:51,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:44:51,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:44:51,730 INFO L87 Difference]: Start difference. First operand 5710 states and 23686 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:52,074 INFO L93 Difference]: Finished difference Result 6871 states and 28008 transitions. [2022-02-11 00:44:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-11 00:44:52,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:52,090 INFO L225 Difference]: With dead ends: 6871 [2022-02-11 00:44:52,090 INFO L226 Difference]: Without dead ends: 6804 [2022-02-11 00:44:52,090 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:44:52,090 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 237 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:52,090 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 213 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 596 Invalid, 0 Unknown, 230 Unchecked, 0.2s Time] [2022-02-11 00:44:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2022-02-11 00:44:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 5770. [2022-02-11 00:44:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5770 states, 5769 states have (on average 4.152366094643786) internal successors, (23955), 5769 states have internal predecessors, (23955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 23955 transitions. [2022-02-11 00:44:52,187 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 23955 transitions. Word has length 24 [2022-02-11 00:44:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:52,187 INFO L470 AbstractCegarLoop]: Abstraction has 5770 states and 23955 transitions. [2022-02-11 00:44:52,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 23955 transitions. [2022-02-11 00:44:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:52,197 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:52,197 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:52,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:52,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-02-11 00:44:52,399 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:52,400 INFO L85 PathProgramCache]: Analyzing trace with hash -513710171, now seen corresponding path program 348 times [2022-02-11 00:44:52,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:52,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618030141] [2022-02-11 00:44:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:52,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:52,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618030141] [2022-02-11 00:44:52,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618030141] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:52,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856184061] [2022-02-11 00:44:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:52,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:52,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:52,573 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:52,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-02-11 00:44:52,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:44:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:52,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:52,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:53,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:44:53,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:53,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 115 [2022-02-11 00:44:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:53,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:53,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:44:53,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:53,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:44:53,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:53,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856184061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:53,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:53,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:44:53,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993262443] [2022-02-11 00:44:53,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:53,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:44:53,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:44:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:44:53,582 INFO L87 Difference]: Start difference. First operand 5770 states and 23955 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:54,647 INFO L93 Difference]: Finished difference Result 6467 states and 26264 transitions. [2022-02-11 00:44:54,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:44:54,647 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:54,660 INFO L225 Difference]: With dead ends: 6467 [2022-02-11 00:44:54,660 INFO L226 Difference]: Without dead ends: 6366 [2022-02-11 00:44:54,660 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:44:54,660 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:54,661 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 512 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1479 Invalid, 0 Unknown, 411 Unchecked, 0.5s Time] [2022-02-11 00:44:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-02-11 00:44:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 5807. [2022-02-11 00:44:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 4.151739579745091) internal successors, (24105), 5806 states have internal predecessors, (24105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 24105 transitions. [2022-02-11 00:44:54,748 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 24105 transitions. Word has length 24 [2022-02-11 00:44:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:54,748 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 24105 transitions. [2022-02-11 00:44:54,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 24105 transitions. [2022-02-11 00:44:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:54,757 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:54,757 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:54,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:54,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-02-11 00:44:54,967 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1405840003, now seen corresponding path program 349 times [2022-02-11 00:44:54,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:54,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772927949] [2022-02-11 00:44:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:54,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:55,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:55,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772927949] [2022-02-11 00:44:55,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772927949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:55,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746333674] [2022-02-11 00:44:55,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:55,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:55,074 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:55,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-02-11 00:44:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:55,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:44:55,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:44:55,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:44:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:55,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:55,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:44:55,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:55,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:44:55,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:55,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746333674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:55,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:55,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-02-11 00:44:55,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293905296] [2022-02-11 00:44:55,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:44:55,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:44:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:44:55,894 INFO L87 Difference]: Start difference. First operand 5807 states and 24105 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:56,390 INFO L93 Difference]: Finished difference Result 6474 states and 26304 transitions. [2022-02-11 00:44:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:44:56,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:56,405 INFO L225 Difference]: With dead ends: 6474 [2022-02-11 00:44:56,405 INFO L226 Difference]: Without dead ends: 6371 [2022-02-11 00:44:56,405 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:44:56,405 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:56,405 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 250 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:44:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2022-02-11 00:44:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 5807. [2022-02-11 00:44:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 4.153289700310024) internal successors, (24114), 5806 states have internal predecessors, (24114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 24114 transitions. [2022-02-11 00:44:56,497 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 24114 transitions. Word has length 24 [2022-02-11 00:44:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:56,497 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 24114 transitions. [2022-02-11 00:44:56,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 24114 transitions. [2022-02-11 00:44:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:56,507 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:56,507 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:56,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-02-11 00:44:56,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-02-11 00:44:56,725 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1566761425, now seen corresponding path program 350 times [2022-02-11 00:44:56,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:56,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769356005] [2022-02-11 00:44:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:56,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:56,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769356005] [2022-02-11 00:44:56,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769356005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:56,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708181998] [2022-02-11 00:44:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:56,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:56,856 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:56,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-02-11 00:44:57,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:57,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:57,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:57,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:44:57,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:44:57,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:44:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:57,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:57,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-02-11 00:44:57,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:57,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:44:57,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:44:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:57,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708181998] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:57,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:57,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:44:57,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250586014] [2022-02-11 00:44:57,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:57,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:44:57,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:44:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:44:57,868 INFO L87 Difference]: Start difference. First operand 5807 states and 24114 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:58,291 INFO L93 Difference]: Finished difference Result 6633 states and 26889 transitions. [2022-02-11 00:44:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 00:44:58,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:44:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:58,304 INFO L225 Difference]: With dead ends: 6633 [2022-02-11 00:44:58,304 INFO L226 Difference]: Without dead ends: 6520 [2022-02-11 00:44:58,304 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:44:58,304 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:58,304 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 251 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:44:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-02-11 00:44:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 5852. [2022-02-11 00:44:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5852 states, 5851 states have (on average 4.15484532558537) internal successors, (24310), 5851 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5852 states to 5852 states and 24310 transitions. [2022-02-11 00:44:58,393 INFO L78 Accepts]: Start accepts. Automaton has 5852 states and 24310 transitions. Word has length 24 [2022-02-11 00:44:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:58,393 INFO L470 AbstractCegarLoop]: Abstraction has 5852 states and 24310 transitions. [2022-02-11 00:44:58,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5852 states and 24310 transitions. [2022-02-11 00:44:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:44:58,403 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:58,403 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:58,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:58,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2022-02-11 00:44:58,619 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:44:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1552715227, now seen corresponding path program 351 times [2022-02-11 00:44:58,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:58,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679388647] [2022-02-11 00:44:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:58,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:58,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679388647] [2022-02-11 00:44:58,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679388647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:58,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130155686] [2022-02-11 00:44:58,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:58,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:58,837 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:44:58,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-02-11 00:44:59,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:44:59,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:44:59,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:59,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:44:59,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:59,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-02-11 00:44:59,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:44:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:44:59,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:59,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:45:00,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:00,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:00,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:00,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130155686] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:00,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:00,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:45:00,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785926848] [2022-02-11 00:45:00,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:00,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:45:00,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:45:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:45:00,141 INFO L87 Difference]: Start difference. First operand 5852 states and 24310 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:01,292 INFO L93 Difference]: Finished difference Result 6930 states and 27765 transitions. [2022-02-11 00:45:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:45:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:01,307 INFO L225 Difference]: With dead ends: 6930 [2022-02-11 00:45:01,307 INFO L226 Difference]: Without dead ends: 6787 [2022-02-11 00:45:01,307 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=389, Invalid=2803, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:45:01,307 INFO L934 BasicCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:01,307 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 611 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1796 Invalid, 0 Unknown, 441 Unchecked, 0.5s Time] [2022-02-11 00:45:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2022-02-11 00:45:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 5893. [2022-02-11 00:45:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 4.165648336727767) internal successors, (24544), 5892 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 24544 transitions. [2022-02-11 00:45:01,405 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 24544 transitions. Word has length 24 [2022-02-11 00:45:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:01,405 INFO L470 AbstractCegarLoop]: Abstraction has 5893 states and 24544 transitions. [2022-02-11 00:45:01,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 24544 transitions. [2022-02-11 00:45:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:01,415 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:01,415 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:01,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:01,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-02-11 00:45:01,629 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:01,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1636871461, now seen corresponding path program 352 times [2022-02-11 00:45:01,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:01,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881255240] [2022-02-11 00:45:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:01,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:01,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:01,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881255240] [2022-02-11 00:45:01,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881255240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:01,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310357461] [2022-02-11 00:45:01,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:01,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:01,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:01,728 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:01,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-02-11 00:45:02,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:02,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:02,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:45:02,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:45:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:02,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:02,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 230 [2022-02-11 00:45:02,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:02,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:45:02,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:02,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310357461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:02,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:02,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-02-11 00:45:02,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303746269] [2022-02-11 00:45:02,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:02,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:45:02,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:45:02,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:02,752 INFO L87 Difference]: Start difference. First operand 5893 states and 24544 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:03,310 INFO L93 Difference]: Finished difference Result 7598 states and 30322 transitions. [2022-02-11 00:45:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:45:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:03,357 INFO L225 Difference]: With dead ends: 7598 [2022-02-11 00:45:03,357 INFO L226 Difference]: Without dead ends: 7421 [2022-02-11 00:45:03,357 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:45:03,358 INFO L934 BasicCegarLoop]: 33 mSDtfsCounter, 207 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:03,358 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 314 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:45:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2022-02-11 00:45:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 5977. [2022-02-11 00:45:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 4.178045515394913) internal successors, (24968), 5976 states have internal predecessors, (24968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 24968 transitions. [2022-02-11 00:45:03,454 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 24968 transitions. Word has length 24 [2022-02-11 00:45:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:03,454 INFO L470 AbstractCegarLoop]: Abstraction has 5977 states and 24968 transitions. [2022-02-11 00:45:03,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 24968 transitions. [2022-02-11 00:45:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:03,464 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:03,464 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:03,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2022-02-11 00:45:03,679 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1482605191, now seen corresponding path program 353 times [2022-02-11 00:45:03,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:03,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902145694] [2022-02-11 00:45:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:03,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:03,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902145694] [2022-02-11 00:45:03,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902145694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:03,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630134080] [2022-02-11 00:45:03,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:03,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:03,804 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:03,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-02-11 00:45:04,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:45:04,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:04,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:04,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:04,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:04,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:04,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 239 [2022-02-11 00:45:04,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 203 [2022-02-11 00:45:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:04,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:04,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-02-11 00:45:05,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:05,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:45:05,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:05,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630134080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:05,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:05,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-02-11 00:45:05,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825319894] [2022-02-11 00:45:05,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:05,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:45:05,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:45:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:45:05,229 INFO L87 Difference]: Start difference. First operand 5977 states and 24968 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:06,913 INFO L93 Difference]: Finished difference Result 9082 states and 34630 transitions. [2022-02-11 00:45:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:45:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:06,933 INFO L225 Difference]: With dead ends: 9082 [2022-02-11 00:45:06,933 INFO L226 Difference]: Without dead ends: 8756 [2022-02-11 00:45:06,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=4137, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:45:06,934 INFO L934 BasicCegarLoop]: 40 mSDtfsCounter, 528 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:06,934 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 527 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1699 Invalid, 0 Unknown, 269 Unchecked, 0.6s Time] [2022-02-11 00:45:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8756 states. [2022-02-11 00:45:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8756 to 6107. [2022-02-11 00:45:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6107 states, 6106 states have (on average 4.171306911234851) internal successors, (25470), 6106 states have internal predecessors, (25470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6107 states to 6107 states and 25470 transitions. [2022-02-11 00:45:07,072 INFO L78 Accepts]: Start accepts. Automaton has 6107 states and 25470 transitions. Word has length 24 [2022-02-11 00:45:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:07,073 INFO L470 AbstractCegarLoop]: Abstraction has 6107 states and 25470 transitions. [2022-02-11 00:45:07,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6107 states and 25470 transitions. [2022-02-11 00:45:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:07,083 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:07,083 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:07,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-02-11 00:45:07,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:07,293 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash 130961543, now seen corresponding path program 354 times [2022-02-11 00:45:07,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:07,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114999753] [2022-02-11 00:45:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:07,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:07,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114999753] [2022-02-11 00:45:07,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114999753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:07,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040889987] [2022-02-11 00:45:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:07,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:07,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:07,373 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:07,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-02-11 00:45:07,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:07,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:07,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:07,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 201 [2022-02-11 00:45:07,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 183 [2022-02-11 00:45:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:08,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:08,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:45:08,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:08,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:45:08,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:08,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040889987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:08,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:08,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-02-11 00:45:08,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080968792] [2022-02-11 00:45:08,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:08,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:45:08,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:08,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:45:08,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:08,444 INFO L87 Difference]: Start difference. First operand 6107 states and 25470 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:09,697 INFO L93 Difference]: Finished difference Result 8780 states and 33541 transitions. [2022-02-11 00:45:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:45:09,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:09,716 INFO L225 Difference]: With dead ends: 8780 [2022-02-11 00:45:09,717 INFO L226 Difference]: Without dead ends: 8392 [2022-02-11 00:45:09,717 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:45:09,717 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 402 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:09,717 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 419 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:45:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8392 states. [2022-02-11 00:45:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8392 to 6168. [2022-02-11 00:45:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6168 states, 6167 states have (on average 4.1281011837197985) internal successors, (25458), 6167 states have internal predecessors, (25458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6168 states to 6168 states and 25458 transitions. [2022-02-11 00:45:09,849 INFO L78 Accepts]: Start accepts. Automaton has 6168 states and 25458 transitions. Word has length 24 [2022-02-11 00:45:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:09,849 INFO L470 AbstractCegarLoop]: Abstraction has 6168 states and 25458 transitions. [2022-02-11 00:45:09,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6168 states and 25458 transitions. [2022-02-11 00:45:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:09,860 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:09,860 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:09,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-02-11 00:45:10,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:10,078 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1662016573, now seen corresponding path program 355 times [2022-02-11 00:45:10,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:10,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677683427] [2022-02-11 00:45:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:10,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:10,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677683427] [2022-02-11 00:45:10,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677683427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:10,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380275684] [2022-02-11 00:45:10,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:10,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:10,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:10,217 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:10,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-02-11 00:45:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:10,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:10,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:10,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 159 [2022-02-11 00:45:10,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:10,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:10,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:45:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:10,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:11,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:11,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:45:11,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:11,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 136 [2022-02-11 00:45:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:11,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380275684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:11,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:11,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-02-11 00:45:11,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484354642] [2022-02-11 00:45:11,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:11,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-11 00:45:11,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-11 00:45:11,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-11 00:45:11,265 INFO L87 Difference]: Start difference. First operand 6168 states and 25458 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:12,175 INFO L93 Difference]: Finished difference Result 8515 states and 32695 transitions. [2022-02-11 00:45:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:45:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:12,194 INFO L225 Difference]: With dead ends: 8515 [2022-02-11 00:45:12,194 INFO L226 Difference]: Without dead ends: 8345 [2022-02-11 00:45:12,195 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=412, Invalid=2668, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:45:12,195 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 360 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:12,195 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 456 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:45:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2022-02-11 00:45:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 6290. [2022-02-11 00:45:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6290 states, 6289 states have (on average 4.138813801876292) internal successors, (26029), 6289 states have internal predecessors, (26029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6290 states to 6290 states and 26029 transitions. [2022-02-11 00:45:12,321 INFO L78 Accepts]: Start accepts. Automaton has 6290 states and 26029 transitions. Word has length 24 [2022-02-11 00:45:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:12,321 INFO L470 AbstractCegarLoop]: Abstraction has 6290 states and 26029 transitions. [2022-02-11 00:45:12,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6290 states and 26029 transitions. [2022-02-11 00:45:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:12,332 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:12,332 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:12,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:12,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:12,547 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:12,547 INFO L85 PathProgramCache]: Analyzing trace with hash 692394341, now seen corresponding path program 356 times [2022-02-11 00:45:12,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:12,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745398106] [2022-02-11 00:45:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:12,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745398106] [2022-02-11 00:45:12,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745398106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67311466] [2022-02-11 00:45:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:12,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:12,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:12,681 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:12,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-02-11 00:45:13,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:13,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:45:13,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:13,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:13,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-11 00:45:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:13,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:13,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:13,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:13,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 228 [2022-02-11 00:45:13,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2022-02-11 00:45:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:13,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67311466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:13,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:13,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:45:13,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479861944] [2022-02-11 00:45:13,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:13,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:45:13,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:45:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:45:13,684 INFO L87 Difference]: Start difference. First operand 6290 states and 26029 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:15,631 INFO L93 Difference]: Finished difference Result 7674 states and 30101 transitions. [2022-02-11 00:45:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:45:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:15,647 INFO L225 Difference]: With dead ends: 7674 [2022-02-11 00:45:15,647 INFO L226 Difference]: Without dead ends: 7390 [2022-02-11 00:45:15,648 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=564, Invalid=4548, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:45:15,648 INFO L934 BasicCegarLoop]: 39 mSDtfsCounter, 282 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:15,648 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 583 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:45:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2022-02-11 00:45:15,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 6310. [2022-02-11 00:45:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6310 states, 6309 states have (on average 4.1236329053732765) internal successors, (26016), 6309 states have internal predecessors, (26016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6310 states to 6310 states and 26016 transitions. [2022-02-11 00:45:15,753 INFO L78 Accepts]: Start accepts. Automaton has 6310 states and 26016 transitions. Word has length 24 [2022-02-11 00:45:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:15,753 INFO L470 AbstractCegarLoop]: Abstraction has 6310 states and 26016 transitions. [2022-02-11 00:45:15,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6310 states and 26016 transitions. [2022-02-11 00:45:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:15,764 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:15,764 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:15,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-02-11 00:45:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:16,011 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1684061767, now seen corresponding path program 357 times [2022-02-11 00:45:16,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:16,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553630579] [2022-02-11 00:45:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:16,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553630579] [2022-02-11 00:45:16,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553630579] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:16,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022752799] [2022-02-11 00:45:16,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:16,196 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:16,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-02-11 00:45:16,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:16,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:16,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:16,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:16,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 187 [2022-02-11 00:45:16,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:16,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 169 [2022-02-11 00:45:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:17,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:17,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-02-11 00:45:17,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:17,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:17,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:17,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022752799] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:17,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:17,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:45:17,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274966957] [2022-02-11 00:45:17,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:17,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:45:17,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:45:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:45:17,684 INFO L87 Difference]: Start difference. First operand 6310 states and 26016 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:19,312 INFO L93 Difference]: Finished difference Result 7639 states and 30274 transitions. [2022-02-11 00:45:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:45:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:19,327 INFO L225 Difference]: With dead ends: 7639 [2022-02-11 00:45:19,328 INFO L226 Difference]: Without dead ends: 7509 [2022-02-11 00:45:19,328 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=485, Invalid=3297, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:45:19,328 INFO L934 BasicCegarLoop]: 44 mSDtfsCounter, 180 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:19,328 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 718 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1696 Invalid, 0 Unknown, 573 Unchecked, 0.6s Time] [2022-02-11 00:45:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2022-02-11 00:45:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 6353. [2022-02-11 00:45:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6353 states, 6352 states have (on average 4.126731738035264) internal successors, (26213), 6352 states have internal predecessors, (26213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6353 states to 6353 states and 26213 transitions. [2022-02-11 00:45:19,434 INFO L78 Accepts]: Start accepts. Automaton has 6353 states and 26213 transitions. Word has length 24 [2022-02-11 00:45:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:19,434 INFO L470 AbstractCegarLoop]: Abstraction has 6353 states and 26213 transitions. [2022-02-11 00:45:19,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6353 states and 26213 transitions. [2022-02-11 00:45:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:19,445 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:19,445 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:19,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-02-11 00:45:19,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,659 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:19,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1338444685, now seen corresponding path program 358 times [2022-02-11 00:45:19,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:19,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329294778] [2022-02-11 00:45:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:19,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:19,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329294778] [2022-02-11 00:45:19,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329294778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:19,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185436751] [2022-02-11 00:45:19,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:19,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:19,743 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:19,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-02-11 00:45:20,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:20,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:20,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:20,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:45:20,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 167 [2022-02-11 00:45:20,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 149 [2022-02-11 00:45:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:20,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:20,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-02-11 00:45:20,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:20,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:20,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:20,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185436751] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:20,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:20,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-02-11 00:45:20,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390571528] [2022-02-11 00:45:20,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:20,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:45:20,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:45:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:45:20,741 INFO L87 Difference]: Start difference. First operand 6353 states and 26213 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:21,306 INFO L93 Difference]: Finished difference Result 7263 states and 29117 transitions. [2022-02-11 00:45:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-11 00:45:21,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:21,327 INFO L225 Difference]: With dead ends: 7263 [2022-02-11 00:45:21,327 INFO L226 Difference]: Without dead ends: 7122 [2022-02-11 00:45:21,327 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:45:21,327 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:21,327 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 317 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:45:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-02-11 00:45:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 6289. [2022-02-11 00:45:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 6288 states have (on average 4.116412213740458) internal successors, (25884), 6288 states have internal predecessors, (25884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 25884 transitions. [2022-02-11 00:45:21,467 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 25884 transitions. Word has length 24 [2022-02-11 00:45:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:21,467 INFO L470 AbstractCegarLoop]: Abstraction has 6289 states and 25884 transitions. [2022-02-11 00:45:21,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 25884 transitions. [2022-02-11 00:45:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:21,481 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:21,481 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:21,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-02-11 00:45:21,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-02-11 00:45:21,703 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 340329627, now seen corresponding path program 359 times [2022-02-11 00:45:21,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:21,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222999711] [2022-02-11 00:45:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:21,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:21,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222999711] [2022-02-11 00:45:21,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222999711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:21,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949723447] [2022-02-11 00:45:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:21,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:21,801 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:21,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-02-11 00:45:22,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:22,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:22,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:22,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:45:22,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 125 [2022-02-11 00:45:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:22,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:22,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:45:22,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:22,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:45:22,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:22,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949723447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:22,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:22,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:45:22,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400076656] [2022-02-11 00:45:22,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:22,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:45:22,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:22,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:45:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:45:22,852 INFO L87 Difference]: Start difference. First operand 6289 states and 25884 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:23,887 INFO L93 Difference]: Finished difference Result 8737 states and 33285 transitions. [2022-02-11 00:45:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:45:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:23,905 INFO L225 Difference]: With dead ends: 8737 [2022-02-11 00:45:23,905 INFO L226 Difference]: Without dead ends: 8493 [2022-02-11 00:45:23,905 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:45:23,905 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 322 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:23,906 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 390 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:45:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2022-02-11 00:45:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 6181. [2022-02-11 00:45:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 4.1029126213592235) internal successors, (25356), 6180 states have internal predecessors, (25356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 25356 transitions. [2022-02-11 00:45:24,018 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 25356 transitions. Word has length 24 [2022-02-11 00:45:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:24,018 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 25356 transitions. [2022-02-11 00:45:24,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 25356 transitions. [2022-02-11 00:45:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:24,029 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:24,029 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:24,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:24,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-02-11 00:45:24,232 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1677689739, now seen corresponding path program 360 times [2022-02-11 00:45:24,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:24,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743810463] [2022-02-11 00:45:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:24,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:24,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:24,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743810463] [2022-02-11 00:45:24,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743810463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:24,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131949162] [2022-02-11 00:45:24,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:24,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:24,381 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:24,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-02-11 00:45:24,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:24,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:24,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:25,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:25,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-02-11 00:45:25,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:45:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:25,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:25,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 299 [2022-02-11 00:45:25,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:25,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:25,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:25,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131949162] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:25,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:25,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-02-11 00:45:25,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105014850] [2022-02-11 00:45:25,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:25,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:45:25,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:45:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:45:25,830 INFO L87 Difference]: Start difference. First operand 6181 states and 25356 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:26,810 INFO L93 Difference]: Finished difference Result 6796 states and 27372 transitions. [2022-02-11 00:45:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:45:26,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:26,824 INFO L225 Difference]: With dead ends: 6796 [2022-02-11 00:45:26,825 INFO L226 Difference]: Without dead ends: 6777 [2022-02-11 00:45:26,825 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:45:26,825 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:26,825 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 394 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1037 Invalid, 0 Unknown, 159 Unchecked, 0.4s Time] [2022-02-11 00:45:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6777 states. [2022-02-11 00:45:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6777 to 6181. [2022-02-11 00:45:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 4.1029126213592235) internal successors, (25356), 6180 states have internal predecessors, (25356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 25356 transitions. [2022-02-11 00:45:26,921 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 25356 transitions. Word has length 24 [2022-02-11 00:45:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:26,921 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 25356 transitions. [2022-02-11 00:45:26,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 25356 transitions. [2022-02-11 00:45:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:26,932 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:26,932 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:26,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:27,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-02-11 00:45:27,149 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1337153743, now seen corresponding path program 361 times [2022-02-11 00:45:27,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:27,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990237322] [2022-02-11 00:45:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:27,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:27,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:27,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990237322] [2022-02-11 00:45:27,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990237322] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:27,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819909731] [2022-02-11 00:45:27,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:27,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:27,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:27,286 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:27,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-02-11 00:45:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:27,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:27,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:27,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:45:27,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:27,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 117 [2022-02-11 00:45:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:28,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:28,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:45:28,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:28,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:28,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:45:28,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819909731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:28,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:28,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-02-11 00:45:28,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765751559] [2022-02-11 00:45:28,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:28,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:45:28,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:45:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:45:28,429 INFO L87 Difference]: Start difference. First operand 6181 states and 25356 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:28,849 INFO L93 Difference]: Finished difference Result 6928 states and 27715 transitions. [2022-02-11 00:45:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 00:45:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:28,864 INFO L225 Difference]: With dead ends: 6928 [2022-02-11 00:45:28,864 INFO L226 Difference]: Without dead ends: 6878 [2022-02-11 00:45:28,864 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:28,864 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 119 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:28,864 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 277 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 590 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-02-11 00:45:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2022-02-11 00:45:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 6100. [2022-02-11 00:45:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6100 states, 6099 states have (on average 4.098048860468929) internal successors, (24994), 6099 states have internal predecessors, (24994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6100 states to 6100 states and 24994 transitions. [2022-02-11 00:45:28,959 INFO L78 Accepts]: Start accepts. Automaton has 6100 states and 24994 transitions. Word has length 24 [2022-02-11 00:45:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:28,959 INFO L470 AbstractCegarLoop]: Abstraction has 6100 states and 24994 transitions. [2022-02-11 00:45:28,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6100 states and 24994 transitions. [2022-02-11 00:45:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:28,969 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:28,969 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:28,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:29,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:29,175 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 356999237, now seen corresponding path program 362 times [2022-02-11 00:45:29,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:29,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046887333] [2022-02-11 00:45:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:29,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:29,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:29,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046887333] [2022-02-11 00:45:29,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046887333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:29,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975389857] [2022-02-11 00:45:29,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:29,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:29,323 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:29,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-02-11 00:45:29,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:29,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:29,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 226 [2022-02-11 00:45:29,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:29,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 198 [2022-02-11 00:45:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:30,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:30,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:45:30,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:30,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:30,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:30,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975389857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:30,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:30,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-02-11 00:45:30,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991018517] [2022-02-11 00:45:30,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:30,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:45:30,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:45:30,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:45:30,512 INFO L87 Difference]: Start difference. First operand 6100 states and 24994 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:31,397 INFO L93 Difference]: Finished difference Result 7139 states and 28376 transitions. [2022-02-11 00:45:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:45:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:31,415 INFO L225 Difference]: With dead ends: 7139 [2022-02-11 00:45:31,415 INFO L226 Difference]: Without dead ends: 7104 [2022-02-11 00:45:31,415 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:45:31,416 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:31,416 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 423 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1460 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-02-11 00:45:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7104 states. [2022-02-11 00:45:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7104 to 6077. [2022-02-11 00:45:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 4.097761685319289) internal successors, (24898), 6076 states have internal predecessors, (24898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 24898 transitions. [2022-02-11 00:45:31,536 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 24898 transitions. Word has length 24 [2022-02-11 00:45:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:31,537 INFO L470 AbstractCegarLoop]: Abstraction has 6077 states and 24898 transitions. [2022-02-11 00:45:31,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 24898 transitions. [2022-02-11 00:45:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:31,547 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:31,547 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:31,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:31,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:31,765 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash 472538421, now seen corresponding path program 363 times [2022-02-11 00:45:31,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:31,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426723119] [2022-02-11 00:45:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:31,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:31,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426723119] [2022-02-11 00:45:31,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426723119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:31,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621413400] [2022-02-11 00:45:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:31,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:31,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:31,885 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:31,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-02-11 00:45:32,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:32,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:32,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:32,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:45:32,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:45:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:32,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:32,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:45:32,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:32,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:32,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:32,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621413400] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:32,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:32,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-02-11 00:45:32,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824841766] [2022-02-11 00:45:32,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:32,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:45:32,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:45:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:45:32,912 INFO L87 Difference]: Start difference. First operand 6077 states and 24898 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:33,451 INFO L93 Difference]: Finished difference Result 6939 states and 27718 transitions. [2022-02-11 00:45:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:45:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:33,467 INFO L225 Difference]: With dead ends: 6939 [2022-02-11 00:45:33,467 INFO L226 Difference]: Without dead ends: 6747 [2022-02-11 00:45:33,467 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:45:33,467 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 149 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:33,467 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 265 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:45:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6747 states. [2022-02-11 00:45:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6747 to 6109. [2022-02-11 00:45:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 4.0987229862475445) internal successors, (25035), 6108 states have internal predecessors, (25035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 25035 transitions. [2022-02-11 00:45:33,563 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 25035 transitions. Word has length 24 [2022-02-11 00:45:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:33,563 INFO L470 AbstractCegarLoop]: Abstraction has 6109 states and 25035 transitions. [2022-02-11 00:45:33,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 25035 transitions. [2022-02-11 00:45:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:33,573 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:33,573 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:33,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:33,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:33,787 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1741957279, now seen corresponding path program 364 times [2022-02-11 00:45:33,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:33,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212138305] [2022-02-11 00:45:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:33,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:33,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:33,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212138305] [2022-02-11 00:45:33,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212138305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:33,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806900989] [2022-02-11 00:45:33,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:33,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:33,872 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:33,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-02-11 00:45:34,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:34,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:34,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:45:34,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:45:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:34,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:34,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 207 [2022-02-11 00:45:34,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:34,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:34,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:34,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806900989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:34,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:34,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:45:34,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743499682] [2022-02-11 00:45:34,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:34,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:45:34,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:34,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:45:34,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:45:34,828 INFO L87 Difference]: Start difference. First operand 6109 states and 25035 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:35,364 INFO L93 Difference]: Finished difference Result 7459 states and 29377 transitions. [2022-02-11 00:45:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:45:35,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:35,380 INFO L225 Difference]: With dead ends: 7459 [2022-02-11 00:45:35,380 INFO L226 Difference]: Without dead ends: 7267 [2022-02-11 00:45:35,381 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:45:35,381 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 158 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:35,381 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 352 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:45:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7267 states. [2022-02-11 00:45:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7267 to 6142. [2022-02-11 00:45:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 4.100472235792216) internal successors, (25181), 6141 states have internal predecessors, (25181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 25181 transitions. [2022-02-11 00:45:35,484 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 25181 transitions. Word has length 24 [2022-02-11 00:45:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:35,484 INFO L470 AbstractCegarLoop]: Abstraction has 6142 states and 25181 transitions. [2022-02-11 00:45:35,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 25181 transitions. [2022-02-11 00:45:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:35,495 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:35,495 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:35,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:35,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:35,711 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash -566466635, now seen corresponding path program 365 times [2022-02-11 00:45:35,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:35,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261511172] [2022-02-11 00:45:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:35,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:35,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:35,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261511172] [2022-02-11 00:45:35,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261511172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:35,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277858856] [2022-02-11 00:45:35,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:35,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:35,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:35,801 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:35,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-02-11 00:45:36,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:45:36,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:36,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:36,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:36,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:36,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-02-11 00:45:36,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:45:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:36,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:36,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-02-11 00:45:36,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:36,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:36,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:36,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277858856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:36,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:36,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-02-11 00:45:36,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860963092] [2022-02-11 00:45:36,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:36,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:45:36,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:36,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:45:36,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:45:36,979 INFO L87 Difference]: Start difference. First operand 6142 states and 25181 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:37,771 INFO L93 Difference]: Finished difference Result 7982 states and 31033 transitions. [2022-02-11 00:45:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:45:37,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:37,793 INFO L225 Difference]: With dead ends: 7982 [2022-02-11 00:45:37,793 INFO L226 Difference]: Without dead ends: 7808 [2022-02-11 00:45:37,795 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:45:37,795 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 244 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:37,796 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 337 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:45:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2022-02-11 00:45:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 6154. [2022-02-11 00:45:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 6153 states have (on average 4.106452137168861) internal successors, (25267), 6153 states have internal predecessors, (25267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 25267 transitions. [2022-02-11 00:45:37,913 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 25267 transitions. Word has length 24 [2022-02-11 00:45:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:37,913 INFO L470 AbstractCegarLoop]: Abstraction has 6154 states and 25267 transitions. [2022-02-11 00:45:37,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 25267 transitions. [2022-02-11 00:45:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:37,924 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:37,924 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:37,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:38,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable383 [2022-02-11 00:45:38,139 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1047100099, now seen corresponding path program 366 times [2022-02-11 00:45:38,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:38,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054696726] [2022-02-11 00:45:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:38,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:38,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054696726] [2022-02-11 00:45:38,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054696726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:38,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502440574] [2022-02-11 00:45:38,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:38,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:38,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:38,255 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:38,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-02-11 00:45:38,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:45:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:38,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:38,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:38,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-02-11 00:45:38,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-02-11 00:45:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:38,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:39,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:45:39,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:39,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-02-11 00:45:39,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:39,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502440574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:39,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:39,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-02-11 00:45:39,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431035677] [2022-02-11 00:45:39,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:39,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:45:39,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:45:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:45:39,291 INFO L87 Difference]: Start difference. First operand 6154 states and 25267 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:40,097 INFO L93 Difference]: Finished difference Result 7489 states and 29294 transitions. [2022-02-11 00:45:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:45:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:40,116 INFO L225 Difference]: With dead ends: 7489 [2022-02-11 00:45:40,116 INFO L226 Difference]: Without dead ends: 7257 [2022-02-11 00:45:40,116 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:45:40,117 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 219 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:40,117 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 366 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:45:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7257 states. [2022-02-11 00:45:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7257 to 6007. [2022-02-11 00:45:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6007 states, 6006 states have (on average 4.092241092241093) internal successors, (24578), 6006 states have internal predecessors, (24578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6007 states to 6007 states and 24578 transitions. [2022-02-11 00:45:40,327 INFO L78 Accepts]: Start accepts. Automaton has 6007 states and 24578 transitions. Word has length 24 [2022-02-11 00:45:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:40,327 INFO L470 AbstractCegarLoop]: Abstraction has 6007 states and 24578 transitions. [2022-02-11 00:45:40,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6007 states and 24578 transitions. [2022-02-11 00:45:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:40,337 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:40,337 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:40,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:40,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:40,553 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:40,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:40,554 INFO L85 PathProgramCache]: Analyzing trace with hash 501563873, now seen corresponding path program 367 times [2022-02-11 00:45:40,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:40,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851323145] [2022-02-11 00:45:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:40,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:40,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851323145] [2022-02-11 00:45:40,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851323145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:40,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180183294] [2022-02-11 00:45:40,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:40,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:40,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:40,721 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:40,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-02-11 00:45:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:41,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:41,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:41,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 149 [2022-02-11 00:45:41,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 00:45:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:41,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:41,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:45:41,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:41,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:45:41,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:41,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180183294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:41,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:41,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:45:41,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504651576] [2022-02-11 00:45:41,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:41,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:41,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:41,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:41,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:41,827 INFO L87 Difference]: Start difference. First operand 6007 states and 24578 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:43,636 INFO L93 Difference]: Finished difference Result 7654 states and 29974 transitions. [2022-02-11 00:45:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:45:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:43,652 INFO L225 Difference]: With dead ends: 7654 [2022-02-11 00:45:43,652 INFO L226 Difference]: Without dead ends: 7458 [2022-02-11 00:45:43,653 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=418, Invalid=4274, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:45:43,653 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 187 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:43,653 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 893 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2749 Invalid, 0 Unknown, 220 Unchecked, 0.8s Time] [2022-02-11 00:45:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7458 states. [2022-02-11 00:45:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7458 to 6128. [2022-02-11 00:45:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6128 states, 6127 states have (on average 4.098090419454872) internal successors, (25109), 6127 states have internal predecessors, (25109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6128 states to 6128 states and 25109 transitions. [2022-02-11 00:45:43,754 INFO L78 Accepts]: Start accepts. Automaton has 6128 states and 25109 transitions. Word has length 24 [2022-02-11 00:45:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:43,754 INFO L470 AbstractCegarLoop]: Abstraction has 6128 states and 25109 transitions. [2022-02-11 00:45:43,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6128 states and 25109 transitions. [2022-02-11 00:45:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:43,763 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:43,763 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:43,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-02-11 00:45:43,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:43,981 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:43,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1677054517, now seen corresponding path program 368 times [2022-02-11 00:45:43,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:43,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845994641] [2022-02-11 00:45:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:43,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:44,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:44,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845994641] [2022-02-11 00:45:44,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845994641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:44,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325455846] [2022-02-11 00:45:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:44,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:44,222 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:44,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-02-11 00:45:44,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:44,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:44,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 226 [2022-02-11 00:45:44,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:44,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 198 [2022-02-11 00:45:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:45,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:45,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:45:45,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:45,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:45:45,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:45,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325455846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:45,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:45,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:45:45,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92181524] [2022-02-11 00:45:45,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:45,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:45,623 INFO L87 Difference]: Start difference. First operand 6128 states and 25109 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:47,331 INFO L93 Difference]: Finished difference Result 8619 states and 33061 transitions. [2022-02-11 00:45:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:45:47,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:47,350 INFO L225 Difference]: With dead ends: 8619 [2022-02-11 00:45:47,351 INFO L226 Difference]: Without dead ends: 8435 [2022-02-11 00:45:47,351 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=511, Invalid=3779, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:45:47,351 INFO L934 BasicCegarLoop]: 42 mSDtfsCounter, 230 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:47,351 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 905 Invalid, 3185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2734 Invalid, 0 Unknown, 395 Unchecked, 0.8s Time] [2022-02-11 00:45:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8435 states. [2022-02-11 00:45:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8435 to 6219. [2022-02-11 00:45:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6219 states, 6218 states have (on average 4.111450627211322) internal successors, (25565), 6218 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6219 states to 6219 states and 25565 transitions. [2022-02-11 00:45:47,525 INFO L78 Accepts]: Start accepts. Automaton has 6219 states and 25565 transitions. Word has length 24 [2022-02-11 00:45:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:47,525 INFO L470 AbstractCegarLoop]: Abstraction has 6219 states and 25565 transitions. [2022-02-11 00:45:47,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6219 states and 25565 transitions. [2022-02-11 00:45:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:47,536 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:47,536 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:47,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:47,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-02-11 00:45:47,753 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:47,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1004346045, now seen corresponding path program 369 times [2022-02-11 00:45:47,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:47,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007546742] [2022-02-11 00:45:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:47,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:47,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:47,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007546742] [2022-02-11 00:45:47,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007546742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:47,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890917726] [2022-02-11 00:45:47,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:47,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:47,869 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:47,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-02-11 00:45:48,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:48,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:48,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:48,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:48,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 192 [2022-02-11 00:45:48,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 172 [2022-02-11 00:45:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:48,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:48,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:45:49,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:49,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:45:49,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:49,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890917726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:49,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:49,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:45:49,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108270743] [2022-02-11 00:45:49,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:49,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:45:49,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:45:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:45:49,089 INFO L87 Difference]: Start difference. First operand 6219 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:49,841 INFO L93 Difference]: Finished difference Result 8149 states and 31587 transitions. [2022-02-11 00:45:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:45:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:49,860 INFO L225 Difference]: With dead ends: 8149 [2022-02-11 00:45:49,860 INFO L226 Difference]: Without dead ends: 7949 [2022-02-11 00:45:49,861 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:45:49,861 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:49,861 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 378 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:45:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2022-02-11 00:45:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 6210. [2022-02-11 00:45:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 4.105814140763408) internal successors, (25493), 6209 states have internal predecessors, (25493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 25493 transitions. [2022-02-11 00:45:49,993 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 25493 transitions. Word has length 24 [2022-02-11 00:45:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:49,994 INFO L470 AbstractCegarLoop]: Abstraction has 6210 states and 25493 transitions. [2022-02-11 00:45:49,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 25493 transitions. [2022-02-11 00:45:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:50,005 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:50,005 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:50,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:50,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-02-11 00:45:50,213 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash -537441183, now seen corresponding path program 370 times [2022-02-11 00:45:50,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:50,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233185784] [2022-02-11 00:45:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:50,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:50,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233185784] [2022-02-11 00:45:50,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233185784] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:50,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131408399] [2022-02-11 00:45:50,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:50,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:50,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:50,446 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:50,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-02-11 00:45:50,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:50,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:50,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:50,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:51,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 153 [2022-02-11 00:45:51,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:51,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:45:51,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:51,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:51,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:51,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:51,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 184 [2022-02-11 00:45:51,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:45:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:51,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131408399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:51,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:51,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:45:51,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590229794] [2022-02-11 00:45:51,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:51,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:51,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:51,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:51,827 INFO L87 Difference]: Start difference. First operand 6210 states and 25493 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:53,902 INFO L93 Difference]: Finished difference Result 8209 states and 31521 transitions. [2022-02-11 00:45:53,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:45:53,902 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:53,919 INFO L225 Difference]: With dead ends: 8209 [2022-02-11 00:45:53,920 INFO L226 Difference]: Without dead ends: 8005 [2022-02-11 00:45:53,920 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=592, Invalid=4238, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:45:53,920 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 390 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:53,920 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 622 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:45:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8005 states. [2022-02-11 00:45:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8005 to 6204. [2022-02-11 00:45:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 6203 states have (on average 4.094147992906658) internal successors, (25396), 6203 states have internal predecessors, (25396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 25396 transitions. [2022-02-11 00:45:54,047 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 25396 transitions. Word has length 24 [2022-02-11 00:45:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:54,047 INFO L470 AbstractCegarLoop]: Abstraction has 6204 states and 25396 transitions. [2022-02-11 00:45:54,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 25396 transitions. [2022-02-11 00:45:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:54,058 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:54,058 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:54,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:54,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-02-11 00:45:54,275 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1076125551, now seen corresponding path program 371 times [2022-02-11 00:45:54,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:54,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199198986] [2022-02-11 00:45:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:54,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:54,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:54,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199198986] [2022-02-11 00:45:54,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199198986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:54,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541338326] [2022-02-11 00:45:54,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:54,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:54,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:54,394 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:54,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-02-11 00:45:54,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:54,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:45:55,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:55,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:55,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2022-02-11 00:45:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:55,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:55,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:55,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:45:55,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:55,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 136 [2022-02-11 00:45:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:55,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541338326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:55,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:55,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:45:55,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961554404] [2022-02-11 00:45:55,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:55,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:55,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:55,479 INFO L87 Difference]: Start difference. First operand 6204 states and 25396 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:57,620 INFO L93 Difference]: Finished difference Result 8310 states and 31390 transitions. [2022-02-11 00:45:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:45:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:45:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:57,637 INFO L225 Difference]: With dead ends: 8310 [2022-02-11 00:45:57,637 INFO L226 Difference]: Without dead ends: 7991 [2022-02-11 00:45:57,638 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=723, Invalid=6083, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:45:57,638 INFO L934 BasicCegarLoop]: 41 mSDtfsCounter, 429 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 2876 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 2965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:57,638 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 765 Invalid, 2965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2876 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:45:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7991 states. [2022-02-11 00:45:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7991 to 6192. [2022-02-11 00:45:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 6191 states have (on average 4.071555483766758) internal successors, (25207), 6191 states have internal predecessors, (25207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 25207 transitions. [2022-02-11 00:45:57,800 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 25207 transitions. Word has length 24 [2022-02-11 00:45:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:57,801 INFO L470 AbstractCegarLoop]: Abstraction has 6192 states and 25207 transitions. [2022-02-11 00:45:57,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 25207 transitions. [2022-02-11 00:45:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:45:57,811 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:57,811 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:57,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:58,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-02-11 00:45:58,024 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:45:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:58,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1567753171, now seen corresponding path program 372 times [2022-02-11 00:45:58,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:58,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269245437] [2022-02-11 00:45:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:58,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:58,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269245437] [2022-02-11 00:45:58,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269245437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:58,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441356965] [2022-02-11 00:45:58,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:58,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:58,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:58,158 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:45:58,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-02-11 00:45:58,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:45:58,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:58,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:45:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:58,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-02-11 00:45:58,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:58,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:45:58,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:45:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:58,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:58,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:45:59,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:59,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 193 [2022-02-11 00:45:59,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-02-11 00:45:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:45:59,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441356965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:59,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:59,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:45:59,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226663740] [2022-02-11 00:45:59,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:59,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:59,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:59,189 INFO L87 Difference]: Start difference. First operand 6192 states and 25207 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:00,500 INFO L93 Difference]: Finished difference Result 8191 states and 31380 transitions. [2022-02-11 00:46:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:46:00,500 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:00,517 INFO L225 Difference]: With dead ends: 8191 [2022-02-11 00:46:00,517 INFO L226 Difference]: Without dead ends: 8001 [2022-02-11 00:46:00,518 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:46:00,518 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 240 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:00,518 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 542 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:46:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2022-02-11 00:46:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 6140. [2022-02-11 00:46:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6140 states, 6139 states have (on average 4.0591301514904705) internal successors, (24919), 6139 states have internal predecessors, (24919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6140 states to 6140 states and 24919 transitions. [2022-02-11 00:46:00,629 INFO L78 Accepts]: Start accepts. Automaton has 6140 states and 24919 transitions. Word has length 24 [2022-02-11 00:46:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:00,629 INFO L470 AbstractCegarLoop]: Abstraction has 6140 states and 24919 transitions. [2022-02-11 00:46:00,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6140 states and 24919 transitions. [2022-02-11 00:46:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:00,639 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:00,639 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:00,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:00,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2022-02-11 00:46:00,851 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -372803211, now seen corresponding path program 373 times [2022-02-11 00:46:00,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:00,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141661702] [2022-02-11 00:46:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:00,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:01,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:01,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141661702] [2022-02-11 00:46:01,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141661702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:01,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504234746] [2022-02-11 00:46:01,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:01,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:01,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:01,013 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:01,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-02-11 00:46:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:01,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 145 [2022-02-11 00:46:01,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-11 00:46:01,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:01,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:01,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:01,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:01,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 186 [2022-02-11 00:46:01,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:46:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:02,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504234746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:02,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:02,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:46:02,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831684831] [2022-02-11 00:46:02,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:02,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:46:02,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:46:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:46:02,145 INFO L87 Difference]: Start difference. First operand 6140 states and 24919 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:02,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:02,920 INFO L93 Difference]: Finished difference Result 7324 states and 28345 transitions. [2022-02-11 00:46:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:46:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:02,935 INFO L225 Difference]: With dead ends: 7324 [2022-02-11 00:46:02,935 INFO L226 Difference]: Without dead ends: 7066 [2022-02-11 00:46:02,935 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:46:02,935 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:02,935 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 292 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:46:02,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2022-02-11 00:46:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 6134. [2022-02-11 00:46:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6134 states, 6133 states have (on average 4.046469916843306) internal successors, (24817), 6133 states have internal predecessors, (24817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6134 states to 6134 states and 24817 transitions. [2022-02-11 00:46:03,032 INFO L78 Accepts]: Start accepts. Automaton has 6134 states and 24817 transitions. Word has length 24 [2022-02-11 00:46:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:03,032 INFO L470 AbstractCegarLoop]: Abstraction has 6134 states and 24817 transitions. [2022-02-11 00:46:03,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6134 states and 24817 transitions. [2022-02-11 00:46:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:03,042 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:03,042 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:03,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:03,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2022-02-11 00:46:03,250 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash -218365693, now seen corresponding path program 374 times [2022-02-11 00:46:03,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:03,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183419556] [2022-02-11 00:46:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:03,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:03,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:03,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183419556] [2022-02-11 00:46:03,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183419556] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:03,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233628237] [2022-02-11 00:46:03,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:03,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:03,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:03,373 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:03,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-02-11 00:46:03,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:03,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 232 [2022-02-11 00:46:04,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:04,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-11 00:46:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:04,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:04,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:04,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:46:04,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:04,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 159 [2022-02-11 00:46:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:04,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233628237] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:04,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:04,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-02-11 00:46:04,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662174665] [2022-02-11 00:46:04,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:04,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:46:04,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:46:04,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:46:04,579 INFO L87 Difference]: Start difference. First operand 6134 states and 24817 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:05,209 INFO L93 Difference]: Finished difference Result 6950 states and 27118 transitions. [2022-02-11 00:46:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:46:05,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:05,223 INFO L225 Difference]: With dead ends: 6950 [2022-02-11 00:46:05,223 INFO L226 Difference]: Without dead ends: 6668 [2022-02-11 00:46:05,224 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:46:05,224 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:05,224 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 398 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:46:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6668 states. [2022-02-11 00:46:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6668 to 6275. [2022-02-11 00:46:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6274 states have (on average 4.019764105833599) internal successors, (25220), 6274 states have internal predecessors, (25220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 25220 transitions. [2022-02-11 00:46:05,323 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 25220 transitions. Word has length 24 [2022-02-11 00:46:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:05,323 INFO L470 AbstractCegarLoop]: Abstraction has 6275 states and 25220 transitions. [2022-02-11 00:46:05,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 25220 transitions. [2022-02-11 00:46:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:05,334 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:05,334 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:05,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:05,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2022-02-11 00:46:05,542 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash -794111297, now seen corresponding path program 375 times [2022-02-11 00:46:05,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:05,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875632272] [2022-02-11 00:46:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:05,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:05,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:05,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875632272] [2022-02-11 00:46:05,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875632272] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:05,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528695562] [2022-02-11 00:46:05,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:05,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:05,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:05,818 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:05,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-02-11 00:46:06,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:46:06,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:06,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:06,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:06,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:06,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:06,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 149 [2022-02-11 00:46:06,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-02-11 00:46:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:06,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:06,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:46:06,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:06,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:46:06,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:06,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528695562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:06,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:06,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:46:06,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744828458] [2022-02-11 00:46:06,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:06,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:46:06,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:46:06,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:46:06,919 INFO L87 Difference]: Start difference. First operand 6275 states and 25220 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:09,343 INFO L93 Difference]: Finished difference Result 7500 states and 29060 transitions. [2022-02-11 00:46:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:46:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:09,360 INFO L225 Difference]: With dead ends: 7500 [2022-02-11 00:46:09,360 INFO L226 Difference]: Without dead ends: 7463 [2022-02-11 00:46:09,361 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=757, Invalid=5885, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 00:46:09,361 INFO L934 BasicCegarLoop]: 47 mSDtfsCounter, 188 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:09,361 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 853 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2262 Invalid, 0 Unknown, 150 Unchecked, 0.7s Time] [2022-02-11 00:46:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2022-02-11 00:46:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 6275. [2022-02-11 00:46:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6274 states have (on average 4.019764105833599) internal successors, (25220), 6274 states have internal predecessors, (25220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 25220 transitions. [2022-02-11 00:46:09,466 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 25220 transitions. Word has length 24 [2022-02-11 00:46:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:09,466 INFO L470 AbstractCegarLoop]: Abstraction has 6275 states and 25220 transitions. [2022-02-11 00:46:09,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 25220 transitions. [2022-02-11 00:46:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:09,477 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:09,477 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:09,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-02-11 00:46:09,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:09,694 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 700491667, now seen corresponding path program 376 times [2022-02-11 00:46:09,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:09,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624941506] [2022-02-11 00:46:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:09,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:09,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:09,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624941506] [2022-02-11 00:46:09,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624941506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:09,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940433062] [2022-02-11 00:46:09,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:09,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:09,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:09,863 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:09,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-02-11 00:46:10,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:10,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:10,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:10,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 244 [2022-02-11 00:46:10,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:10,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 206 [2022-02-11 00:46:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:10,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:10,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-02-11 00:46:10,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:10,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:46:10,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:10,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940433062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:10,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:10,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:46:10,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485164179] [2022-02-11 00:46:10,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:10,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:46:10,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:46:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:46:10,930 INFO L87 Difference]: Start difference. First operand 6275 states and 25220 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:13,018 INFO L93 Difference]: Finished difference Result 8346 states and 31810 transitions. [2022-02-11 00:46:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-11 00:46:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:13,037 INFO L225 Difference]: With dead ends: 8346 [2022-02-11 00:46:13,037 INFO L226 Difference]: Without dead ends: 8125 [2022-02-11 00:46:13,038 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=646, Invalid=5360, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:46:13,038 INFO L934 BasicCegarLoop]: 56 mSDtfsCounter, 249 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 817 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:13,038 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1077 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2613 Invalid, 0 Unknown, 817 Unchecked, 0.7s Time] [2022-02-11 00:46:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8125 states. [2022-02-11 00:46:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8125 to 6321. [2022-02-11 00:46:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 6320 states have (on average 4.02120253164557) internal successors, (25414), 6320 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 25414 transitions. [2022-02-11 00:46:13,157 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 25414 transitions. Word has length 24 [2022-02-11 00:46:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:13,157 INFO L470 AbstractCegarLoop]: Abstraction has 6321 states and 25414 transitions. [2022-02-11 00:46:13,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 25414 transitions. [2022-02-11 00:46:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:13,168 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:13,168 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:13,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:13,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:13,384 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1810913095, now seen corresponding path program 377 times [2022-02-11 00:46:13,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:13,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153658260] [2022-02-11 00:46:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:13,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:13,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153658260] [2022-02-11 00:46:13,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153658260] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:13,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387078598] [2022-02-11 00:46:13,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:13,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:13,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:13,500 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:13,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-02-11 00:46:13,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:46:13,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:13,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:13,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:13,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:14,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:46:14,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:46:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:14,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:14,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:46:14,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:14,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:46:14,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:14,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387078598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:14,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:14,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:46:14,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112575217] [2022-02-11 00:46:14,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:14,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:46:14,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:46:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:46:14,636 INFO L87 Difference]: Start difference. First operand 6321 states and 25414 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:15,461 INFO L93 Difference]: Finished difference Result 7513 states and 29097 transitions. [2022-02-11 00:46:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 00:46:15,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:15,477 INFO L225 Difference]: With dead ends: 7513 [2022-02-11 00:46:15,477 INFO L226 Difference]: Without dead ends: 7456 [2022-02-11 00:46:15,477 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:46:15,477 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:15,477 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 429 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:46:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-02-11 00:46:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6267. [2022-02-11 00:46:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6267 states, 6266 states have (on average 4.022023619533993) internal successors, (25202), 6266 states have internal predecessors, (25202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6267 states to 6267 states and 25202 transitions. [2022-02-11 00:46:15,583 INFO L78 Accepts]: Start accepts. Automaton has 6267 states and 25202 transitions. Word has length 24 [2022-02-11 00:46:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:15,583 INFO L470 AbstractCegarLoop]: Abstraction has 6267 states and 25202 transitions. [2022-02-11 00:46:15,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6267 states and 25202 transitions. [2022-02-11 00:46:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:15,594 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:15,594 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:15,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:15,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:15,812 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1847553732, now seen corresponding path program 378 times [2022-02-11 00:46:15,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:15,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491757435] [2022-02-11 00:46:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:15,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:15,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491757435] [2022-02-11 00:46:15,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491757435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:15,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422786962] [2022-02-11 00:46:15,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:46:15,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:15,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:16,000 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:16,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-02-11 00:46:16,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:46:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:16,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:16,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-02-11 00:46:16,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:16,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 145 [2022-02-11 00:46:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:16,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:16,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 168 [2022-02-11 00:46:17,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:17,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:46:17,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:17,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422786962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:17,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:17,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:46:17,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463272404] [2022-02-11 00:46:17,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:17,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:46:17,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:46:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:46:17,212 INFO L87 Difference]: Start difference. First operand 6267 states and 25202 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:18,535 INFO L93 Difference]: Finished difference Result 7620 states and 29452 transitions. [2022-02-11 00:46:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:46:18,536 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:18,551 INFO L225 Difference]: With dead ends: 7620 [2022-02-11 00:46:18,551 INFO L226 Difference]: Without dead ends: 7401 [2022-02-11 00:46:18,552 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=358, Invalid=2398, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:46:18,552 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 167 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:18,552 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 540 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1409 Invalid, 0 Unknown, 689 Unchecked, 0.5s Time] [2022-02-11 00:46:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2022-02-11 00:46:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 6490. [2022-02-11 00:46:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6490 states, 6489 states have (on average 4.014948374171675) internal successors, (26053), 6489 states have internal predecessors, (26053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6490 states to 6490 states and 26053 transitions. [2022-02-11 00:46:18,666 INFO L78 Accepts]: Start accepts. Automaton has 6490 states and 26053 transitions. Word has length 24 [2022-02-11 00:46:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:18,666 INFO L470 AbstractCegarLoop]: Abstraction has 6490 states and 26053 transitions. [2022-02-11 00:46:18,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6490 states and 26053 transitions. [2022-02-11 00:46:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:18,677 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:18,677 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:18,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-02-11 00:46:18,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:18,891 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1963783006, now seen corresponding path program 379 times [2022-02-11 00:46:18,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:18,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137751] [2022-02-11 00:46:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:18,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:18,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137751] [2022-02-11 00:46:18,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:18,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141181142] [2022-02-11 00:46:18,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:18,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:18,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:18,985 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:18,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-02-11 00:46:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:19,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:19,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-02-11 00:46:19,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:19,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-02-11 00:46:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:19,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:19,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 281 [2022-02-11 00:46:20,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:20,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-11 00:46:20,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:46:20,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141181142] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:20,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:20,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:46:20,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30996980] [2022-02-11 00:46:20,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:20,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:46:20,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:20,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:46:20,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:46:20,234 INFO L87 Difference]: Start difference. First operand 6490 states and 26053 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:22,511 INFO L93 Difference]: Finished difference Result 8651 states and 32934 transitions. [2022-02-11 00:46:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 00:46:22,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:22,529 INFO L225 Difference]: With dead ends: 8651 [2022-02-11 00:46:22,529 INFO L226 Difference]: Without dead ends: 8061 [2022-02-11 00:46:22,530 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=807, Invalid=6675, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 00:46:22,530 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 283 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:22,530 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 718 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:46:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2022-02-11 00:46:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6495. [2022-02-11 00:46:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6495 states, 6494 states have (on average 3.997074222359101) internal successors, (25957), 6494 states have internal predecessors, (25957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6495 states to 6495 states and 25957 transitions. [2022-02-11 00:46:22,646 INFO L78 Accepts]: Start accepts. Automaton has 6495 states and 25957 transitions. Word has length 24 [2022-02-11 00:46:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:22,646 INFO L470 AbstractCegarLoop]: Abstraction has 6495 states and 25957 transitions. [2022-02-11 00:46:22,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6495 states and 25957 transitions. [2022-02-11 00:46:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:22,657 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:22,657 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:22,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-02-11 00:46:22,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-02-11 00:46:22,875 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash -100948058, now seen corresponding path program 380 times [2022-02-11 00:46:22,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:22,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018769501] [2022-02-11 00:46:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:22,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 00:46:22,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:22,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018769501] [2022-02-11 00:46:22,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018769501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:22,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309675199] [2022-02-11 00:46:22,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:22,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:22,946 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:22,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-02-11 00:46:23,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:23,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:23,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:23,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:23,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-02-11 00:46:23,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:23,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 00:46:23,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:23,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:23,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:23,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:23,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 175 [2022-02-11 00:46:23,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-02-11 00:46:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:24,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309675199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:24,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:24,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:46:24,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192525736] [2022-02-11 00:46:24,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:24,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:46:24,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:46:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:46:24,035 INFO L87 Difference]: Start difference. First operand 6495 states and 25957 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:24,747 INFO L93 Difference]: Finished difference Result 8755 states and 33568 transitions. [2022-02-11 00:46:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:46:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:24,767 INFO L225 Difference]: With dead ends: 8755 [2022-02-11 00:46:24,768 INFO L226 Difference]: Without dead ends: 8515 [2022-02-11 00:46:24,768 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:46:24,768 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 218 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:24,768 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 423 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1068 Invalid, 0 Unknown, 397 Unchecked, 0.3s Time] [2022-02-11 00:46:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8515 states. [2022-02-11 00:46:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8515 to 6808. [2022-02-11 00:46:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6807 states have (on average 4.029675334214779) internal successors, (27430), 6807 states have internal predecessors, (27430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 27430 transitions. [2022-02-11 00:46:24,910 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 27430 transitions. Word has length 24 [2022-02-11 00:46:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 6808 states and 27430 transitions. [2022-02-11 00:46:24,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 27430 transitions. [2022-02-11 00:46:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:24,922 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:24,922 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:24,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-02-11 00:46:25,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:25,140 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -459608090, now seen corresponding path program 381 times [2022-02-11 00:46:25,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:25,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768974389] [2022-02-11 00:46:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:25,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:25,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:25,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768974389] [2022-02-11 00:46:25,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768974389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:25,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477996717] [2022-02-11 00:46:25,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:25,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:25,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:25,214 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:25,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-02-11 00:46:25,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:46:25,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:25,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:25,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-02-11 00:46:26,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:26,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-11 00:46:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:26,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:26,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:26,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-02-11 00:46:26,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:26,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 243 [2022-02-11 00:46:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:26,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477996717] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:26,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:26,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 00:46:26,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892249720] [2022-02-11 00:46:26,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:26,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-11 00:46:26,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-11 00:46:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-11 00:46:26,865 INFO L87 Difference]: Start difference. First operand 6808 states and 27430 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:27,814 INFO L93 Difference]: Finished difference Result 8076 states and 31053 transitions. [2022-02-11 00:46:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:46:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:27,831 INFO L225 Difference]: With dead ends: 8076 [2022-02-11 00:46:27,831 INFO L226 Difference]: Without dead ends: 7554 [2022-02-11 00:46:27,832 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=2097, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:46:27,832 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 233 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:27,832 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 502 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1237 Invalid, 0 Unknown, 566 Unchecked, 0.4s Time] [2022-02-11 00:46:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7554 states. [2022-02-11 00:46:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7554 to 6835. [2022-02-11 00:46:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6835 states, 6834 states have (on average 4.0011706175007316) internal successors, (27344), 6834 states have internal predecessors, (27344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6835 states to 6835 states and 27344 transitions. [2022-02-11 00:46:27,965 INFO L78 Accepts]: Start accepts. Automaton has 6835 states and 27344 transitions. Word has length 24 [2022-02-11 00:46:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:27,965 INFO L470 AbstractCegarLoop]: Abstraction has 6835 states and 27344 transitions. [2022-02-11 00:46:27,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6835 states and 27344 transitions. [2022-02-11 00:46:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:27,978 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:27,978 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:27,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:28,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-02-11 00:46:28,196 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1190818277, now seen corresponding path program 382 times [2022-02-11 00:46:28,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:28,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561243910] [2022-02-11 00:46:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:28,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:28,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:28,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561243910] [2022-02-11 00:46:28,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561243910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:28,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163397500] [2022-02-11 00:46:28,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:28,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:28,350 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:28,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-02-11 00:46:28,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:28,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:28,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:28,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:28,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 228 [2022-02-11 00:46:29,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:29,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-11 00:46:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:29,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:29,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:29,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:46:29,540 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:46:29,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 152 [2022-02-11 00:46:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:29,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163397500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:29,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:29,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-02-11 00:46:29,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698455269] [2022-02-11 00:46:29,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:29,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:46:29,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:46:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:46:29,729 INFO L87 Difference]: Start difference. First operand 6835 states and 27344 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:30,684 INFO L93 Difference]: Finished difference Result 8547 states and 33056 transitions. [2022-02-11 00:46:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:46:30,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:30,703 INFO L225 Difference]: With dead ends: 8547 [2022-02-11 00:46:30,703 INFO L226 Difference]: Without dead ends: 8435 [2022-02-11 00:46:30,704 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:46:30,704 INFO L934 BasicCegarLoop]: 49 mSDtfsCounter, 206 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:30,704 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 467 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:46:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8435 states. [2022-02-11 00:46:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8435 to 6938. [2022-02-11 00:46:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6938 states, 6937 states have (on average 4.0105232809571865) internal successors, (27821), 6937 states have internal predecessors, (27821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6938 states to 6938 states and 27821 transitions. [2022-02-11 00:46:30,831 INFO L78 Accepts]: Start accepts. Automaton has 6938 states and 27821 transitions. Word has length 24 [2022-02-11 00:46:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:30,831 INFO L470 AbstractCegarLoop]: Abstraction has 6938 states and 27821 transitions. [2022-02-11 00:46:30,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 6938 states and 27821 transitions. [2022-02-11 00:46:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:30,843 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:30,843 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:30,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-02-11 00:46:31,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-02-11 00:46:31,055 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1490582285, now seen corresponding path program 383 times [2022-02-11 00:46:31,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:31,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636044630] [2022-02-11 00:46:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:31,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:31,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:31,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636044630] [2022-02-11 00:46:31,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636044630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:31,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212719793] [2022-02-11 00:46:31,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:31,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:31,177 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:31,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-02-11 00:46:31,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:46:31,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:31,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:31,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:31,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-02-11 00:46:31,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:31,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:46:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:31,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:31,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:31,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:46:31,992 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:46:31,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 152 [2022-02-11 00:46:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:32,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212719793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:32,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:32,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-02-11 00:46:32,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997303737] [2022-02-11 00:46:32,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:32,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-11 00:46:32,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-11 00:46:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-11 00:46:32,095 INFO L87 Difference]: Start difference. First operand 6938 states and 27821 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:33,270 INFO L93 Difference]: Finished difference Result 8657 states and 33240 transitions. [2022-02-11 00:46:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:46:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:33,288 INFO L225 Difference]: With dead ends: 8657 [2022-02-11 00:46:33,288 INFO L226 Difference]: Without dead ends: 8508 [2022-02-11 00:46:33,288 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:46:33,288 INFO L934 BasicCegarLoop]: 53 mSDtfsCounter, 345 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:33,288 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 531 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:46:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8508 states. [2022-02-11 00:46:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8508 to 6897. [2022-02-11 00:46:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6896 states have (on average 4.002755220417633) internal successors, (27603), 6896 states have internal predecessors, (27603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 27603 transitions. [2022-02-11 00:46:33,411 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 27603 transitions. Word has length 24 [2022-02-11 00:46:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:33,411 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 27603 transitions. [2022-02-11 00:46:33,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 27603 transitions. [2022-02-11 00:46:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:33,423 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:33,423 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:33,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-02-11 00:46:33,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-02-11 00:46:33,626 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1285346213, now seen corresponding path program 384 times [2022-02-11 00:46:33,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:33,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997034983] [2022-02-11 00:46:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:33,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:33,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:33,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997034983] [2022-02-11 00:46:33,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997034983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:33,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484062238] [2022-02-11 00:46:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:46:33,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:33,741 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:33,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-02-11 00:46:34,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:46:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:34,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:34,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 153 [2022-02-11 00:46:34,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:34,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-02-11 00:46:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:34,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:34,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:34,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 287 [2022-02-11 00:46:34,717 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-11 00:46:34,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 255 [2022-02-11 00:46:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:34,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484062238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:34,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:34,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:46:34,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891127054] [2022-02-11 00:46:34,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:34,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:46:34,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:34,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:46:34,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:46:34,876 INFO L87 Difference]: Start difference. First operand 6897 states and 27603 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:35,757 INFO L93 Difference]: Finished difference Result 8420 states and 32557 transitions. [2022-02-11 00:46:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:46:35,757 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:35,774 INFO L225 Difference]: With dead ends: 8420 [2022-02-11 00:46:35,774 INFO L226 Difference]: Without dead ends: 8231 [2022-02-11 00:46:35,775 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=2085, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:46:35,775 INFO L934 BasicCegarLoop]: 43 mSDtfsCounter, 302 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:35,775 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 362 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:46:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8231 states. [2022-02-11 00:46:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8231 to 6895. [2022-02-11 00:46:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6895 states, 6894 states have (on average 3.9963736582535536) internal successors, (27551), 6894 states have internal predecessors, (27551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 27551 transitions. [2022-02-11 00:46:35,903 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 27551 transitions. Word has length 24 [2022-02-11 00:46:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:35,903 INFO L470 AbstractCegarLoop]: Abstraction has 6895 states and 27551 transitions. [2022-02-11 00:46:35,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 27551 transitions. [2022-02-11 00:46:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:35,915 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:35,915 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:35,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-02-11 00:46:36,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:36,133 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash 622769035, now seen corresponding path program 385 times [2022-02-11 00:46:36,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:36,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644373234] [2022-02-11 00:46:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:36,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:36,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:36,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644373234] [2022-02-11 00:46:36,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644373234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:36,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573727338] [2022-02-11 00:46:36,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:36,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:36,238 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:36,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-02-11 00:46:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:36,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:36,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:36,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-02-11 00:46:36,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-02-11 00:46:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:36,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:36,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-02-11 00:46:37,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:37,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:46:37,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:37,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573727338] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:37,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:37,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-02-11 00:46:37,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346680763] [2022-02-11 00:46:37,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:37,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:46:37,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:46:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:46:37,221 INFO L87 Difference]: Start difference. First operand 6895 states and 27551 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:38,368 INFO L93 Difference]: Finished difference Result 8789 states and 33543 transitions. [2022-02-11 00:46:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:46:38,369 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:38,393 INFO L225 Difference]: With dead ends: 8789 [2022-02-11 00:46:38,394 INFO L226 Difference]: Without dead ends: 8576 [2022-02-11 00:46:38,394 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=433, Invalid=3857, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:46:38,394 INFO L934 BasicCegarLoop]: 68 mSDtfsCounter, 201 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:38,394 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 781 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:46:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2022-02-11 00:46:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 6842. [2022-02-11 00:46:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 3.9941529016225696) internal successors, (27324), 6841 states have internal predecessors, (27324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 27324 transitions. [2022-02-11 00:46:38,563 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 27324 transitions. Word has length 24 [2022-02-11 00:46:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:38,563 INFO L470 AbstractCegarLoop]: Abstraction has 6842 states and 27324 transitions. [2022-02-11 00:46:38,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 27324 transitions. [2022-02-11 00:46:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:38,574 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:38,574 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:38,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:38,787 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1798259679, now seen corresponding path program 386 times [2022-02-11 00:46:38,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:38,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534621613] [2022-02-11 00:46:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:38,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:38,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:38,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534621613] [2022-02-11 00:46:38,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534621613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:38,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298373405] [2022-02-11 00:46:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:38,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:38,887 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:38,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-02-11 00:46:39,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:39,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:39,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:39,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-02-11 00:46:39,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:46:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:39,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:39,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-02-11 00:46:40,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:40,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:46:40,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:40,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298373405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:40,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:40,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:46:40,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418565512] [2022-02-11 00:46:40,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:40,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:46:40,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:46:40,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:46:40,082 INFO L87 Difference]: Start difference. First operand 6842 states and 27324 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:41,387 INFO L93 Difference]: Finished difference Result 9456 states and 35447 transitions. [2022-02-11 00:46:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:46:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:41,413 INFO L225 Difference]: With dead ends: 9456 [2022-02-11 00:46:41,413 INFO L226 Difference]: Without dead ends: 9252 [2022-02-11 00:46:41,414 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=514, Invalid=4178, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:46:41,414 INFO L934 BasicCegarLoop]: 63 mSDtfsCounter, 306 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:41,414 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 847 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:46:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2022-02-11 00:46:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 6871. [2022-02-11 00:46:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6871 states, 6870 states have (on average 3.9983988355167392) internal successors, (27469), 6870 states have internal predecessors, (27469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6871 states to 6871 states and 27469 transitions. [2022-02-11 00:46:41,610 INFO L78 Accepts]: Start accepts. Automaton has 6871 states and 27469 transitions. Word has length 24 [2022-02-11 00:46:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:41,610 INFO L470 AbstractCegarLoop]: Abstraction has 6871 states and 27469 transitions. [2022-02-11 00:46:41,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6871 states and 27469 transitions. [2022-02-11 00:46:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:41,623 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:41,623 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:41,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:41,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:41,827 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash -883140883, now seen corresponding path program 387 times [2022-02-11 00:46:41,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:41,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010637205] [2022-02-11 00:46:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:41,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:41,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:41,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010637205] [2022-02-11 00:46:41,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010637205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:41,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856309181] [2022-02-11 00:46:41,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:41,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:41,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:41,921 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:41,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-02-11 00:46:42,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:46:42,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:42,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:42,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-02-11 00:46:42,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 125 [2022-02-11 00:46:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:42,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:42,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:46:43,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:43,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-02-11 00:46:43,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:43,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856309181] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:43,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:43,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-02-11 00:46:43,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844682143] [2022-02-11 00:46:43,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:43,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:46:43,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:46:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:46:43,065 INFO L87 Difference]: Start difference. First operand 6871 states and 27469 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:44,662 INFO L93 Difference]: Finished difference Result 8808 states and 33330 transitions. [2022-02-11 00:46:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 00:46:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:44,683 INFO L225 Difference]: With dead ends: 8808 [2022-02-11 00:46:44,683 INFO L226 Difference]: Without dead ends: 8544 [2022-02-11 00:46:44,684 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=3881, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:46:44,684 INFO L934 BasicCegarLoop]: 59 mSDtfsCounter, 239 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:44,684 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 694 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:46:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8544 states. [2022-02-11 00:46:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8544 to 6751. [2022-02-11 00:46:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6751 states, 6750 states have (on average 3.9844444444444442) internal successors, (26895), 6750 states have internal predecessors, (26895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 26895 transitions. [2022-02-11 00:46:44,808 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 26895 transitions. Word has length 24 [2022-02-11 00:46:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:44,808 INFO L470 AbstractCegarLoop]: Abstraction has 6751 states and 26895 transitions. [2022-02-11 00:46:44,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 26895 transitions. [2022-02-11 00:46:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:44,819 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:44,819 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:44,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-02-11 00:46:45,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:45,036 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash -416236021, now seen corresponding path program 388 times [2022-02-11 00:46:45,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:45,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976199817] [2022-02-11 00:46:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:45,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:45,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976199817] [2022-02-11 00:46:45,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976199817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:45,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234045124] [2022-02-11 00:46:45,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:45,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:45,138 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:45,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-02-11 00:46:45,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:45,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:45,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 303 [2022-02-11 00:46:46,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-11 00:46:46,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:46,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:46,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:46,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:46,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 216 [2022-02-11 00:46:46,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2022-02-11 00:46:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:46,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234045124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:46,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:46,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-02-11 00:46:46,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119525580] [2022-02-11 00:46:46,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:46,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-11 00:46:46,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-11 00:46:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-11 00:46:46,477 INFO L87 Difference]: Start difference. First operand 6751 states and 26895 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:48,091 INFO L93 Difference]: Finished difference Result 9334 states and 34965 transitions. [2022-02-11 00:46:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:46:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:48,114 INFO L225 Difference]: With dead ends: 9334 [2022-02-11 00:46:48,114 INFO L226 Difference]: Without dead ends: 9112 [2022-02-11 00:46:48,115 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=567, Invalid=4403, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:46:48,115 INFO L934 BasicCegarLoop]: 51 mSDtfsCounter, 331 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:48,115 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 680 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:46:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9112 states. [2022-02-11 00:46:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9112 to 6766. [2022-02-11 00:46:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6765 states have (on average 3.991278640059128) internal successors, (27001), 6765 states have internal predecessors, (27001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 27001 transitions. [2022-02-11 00:46:48,297 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 27001 transitions. Word has length 24 [2022-02-11 00:46:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:48,297 INFO L470 AbstractCegarLoop]: Abstraction has 6766 states and 27001 transitions. [2022-02-11 00:46:48,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 27001 transitions. [2022-02-11 00:46:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:48,309 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:48,309 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:48,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Ended with exit code 0 [2022-02-11 00:46:48,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:48,526 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1197330713, now seen corresponding path program 389 times [2022-02-11 00:46:48,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:48,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12653410] [2022-02-11 00:46:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:48,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:48,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12653410] [2022-02-11 00:46:48,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12653410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:48,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391036760] [2022-02-11 00:46:48,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:48,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:48,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:48,622 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:48,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-02-11 00:46:49,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:46:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:49,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 169 [2022-02-11 00:46:49,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-11 00:46:49,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:49,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:49,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:49,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:46:49,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:49,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 136 [2022-02-11 00:46:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:49,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391036760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:49,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:49,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-02-11 00:46:49,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252003162] [2022-02-11 00:46:49,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:49,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 00:46:49,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:49,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 00:46:49,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-11 00:46:49,936 INFO L87 Difference]: Start difference. First operand 6766 states and 27001 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:51,989 INFO L93 Difference]: Finished difference Result 9557 states and 35342 transitions. [2022-02-11 00:46:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-11 00:46:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:52,011 INFO L225 Difference]: With dead ends: 9557 [2022-02-11 00:46:52,011 INFO L226 Difference]: Without dead ends: 9257 [2022-02-11 00:46:52,012 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=707, Invalid=6603, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:46:52,012 INFO L934 BasicCegarLoop]: 55 mSDtfsCounter, 429 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:52,012 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 663 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:46:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9257 states. [2022-02-11 00:46:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9257 to 6734. [2022-02-11 00:46:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6734 states, 6733 states have (on average 3.9581167384523988) internal successors, (26650), 6733 states have internal predecessors, (26650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6734 states to 6734 states and 26650 transitions. [2022-02-11 00:46:52,185 INFO L78 Accepts]: Start accepts. Automaton has 6734 states and 26650 transitions. Word has length 24 [2022-02-11 00:46:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:52,185 INFO L470 AbstractCegarLoop]: Abstraction has 6734 states and 26650 transitions. [2022-02-11 00:46:52,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 6734 states and 26650 transitions. [2022-02-11 00:46:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:52,196 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:52,196 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:52,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:52,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-02-11 00:46:52,414 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -321708085, now seen corresponding path program 390 times [2022-02-11 00:46:52,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:52,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414096996] [2022-02-11 00:46:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:52,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:52,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414096996] [2022-02-11 00:46:52,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414096996] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:52,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794611427] [2022-02-11 00:46:52,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:46:52,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:52,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:52,480 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:52,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-02-11 00:46:52,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 00:46:52,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:52,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 163 [2022-02-11 00:46:53,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:53,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-11 00:46:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:53,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:53,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:53,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:53,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 184 [2022-02-11 00:46:53,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-02-11 00:46:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:53,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794611427] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:53,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:53,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 19 [2022-02-11 00:46:53,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416672595] [2022-02-11 00:46:53,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:53,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-11 00:46:53,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-11 00:46:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-11 00:46:53,474 INFO L87 Difference]: Start difference. First operand 6734 states and 26650 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:54,489 INFO L93 Difference]: Finished difference Result 8110 states and 30769 transitions. [2022-02-11 00:46:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:46:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:54,507 INFO L225 Difference]: With dead ends: 8110 [2022-02-11 00:46:54,507 INFO L226 Difference]: Without dead ends: 7741 [2022-02-11 00:46:54,507 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=396, Invalid=3636, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:46:54,507 INFO L934 BasicCegarLoop]: 45 mSDtfsCounter, 245 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:54,508 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 495 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:46:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2022-02-11 00:46:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6734. [2022-02-11 00:46:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6734 states, 6733 states have (on average 3.93658101886232) internal successors, (26505), 6733 states have internal predecessors, (26505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6734 states to 6734 states and 26505 transitions. [2022-02-11 00:46:54,622 INFO L78 Accepts]: Start accepts. Automaton has 6734 states and 26505 transitions. Word has length 24 [2022-02-11 00:46:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:54,623 INFO L470 AbstractCegarLoop]: Abstraction has 6734 states and 26505 transitions. [2022-02-11 00:46:54,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6734 states and 26505 transitions. [2022-02-11 00:46:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:54,634 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:54,634 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:54,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-02-11 00:46:54,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:54,851 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash -346125985, now seen corresponding path program 391 times [2022-02-11 00:46:54,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:54,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140706840] [2022-02-11 00:46:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:54,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:54,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:54,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140706840] [2022-02-11 00:46:54,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140706840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:54,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258650845] [2022-02-11 00:46:54,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:54,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:54,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:54,963 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:54,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-02-11 00:46:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:55,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:55,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 290 [2022-02-11 00:46:55,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-11 00:46:55,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:55,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:55,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:56,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-02-11 00:46:56,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:56,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 159 [2022-02-11 00:46:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:56,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258650845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:56,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:56,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-02-11 00:46:56,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102902367] [2022-02-11 00:46:56,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:56,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-11 00:46:56,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-11 00:46:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-11 00:46:56,384 INFO L87 Difference]: Start difference. First operand 6734 states and 26505 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:57,117 INFO L93 Difference]: Finished difference Result 7860 states and 30230 transitions. [2022-02-11 00:46:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:46:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-11 00:46:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:57,135 INFO L225 Difference]: With dead ends: 7860 [2022-02-11 00:46:57,135 INFO L226 Difference]: Without dead ends: 7748 [2022-02-11 00:46:57,135 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:46:57,136 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 181 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:57,136 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 373 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 00:46:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7748 states. [2022-02-11 00:46:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7748 to 6826. [2022-02-11 00:46:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6826 states, 6825 states have (on average 3.942857142857143) internal successors, (26910), 6825 states have internal predecessors, (26910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6826 states to 6826 states and 26910 transitions. [2022-02-11 00:46:57,259 INFO L78 Accepts]: Start accepts. Automaton has 6826 states and 26910 transitions. Word has length 24 [2022-02-11 00:46:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:57,260 INFO L470 AbstractCegarLoop]: Abstraction has 6826 states and 26910 transitions. [2022-02-11 00:46:57,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6826 states and 26910 transitions. [2022-02-11 00:46:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 00:46:57,271 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:57,271 INFO L515 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:57,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:57,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:57,486 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-11 00:46:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1267440749, now seen corresponding path program 392 times [2022-02-11 00:46:57,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:57,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573334467] [2022-02-11 00:46:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:57,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:57,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573334467] [2022-02-11 00:46:57,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573334467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:57,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429942051] [2022-02-11 00:46:57,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:57,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:57,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:57,621 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:46:57,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-02-11 00:46:57,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:57,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:57,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 00:46:57,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:58,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 245 [2022-02-11 00:46:58,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-02-11 00:46:58,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:46:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:58,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:58,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-02-11 00:46:58,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-02-11 00:46:58,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:58,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 138 [2022-02-11 00:46:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 00:46:58,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429942051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:58,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:58,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:46:58,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013322014] [2022-02-11 00:46:58,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:58,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:46:58,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:58,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:46:58,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:46:58,807 INFO L87 Difference]: Start difference. First operand 6826 states and 26910 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-11 00:46:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:46:59,404 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:46:59,405 INFO L934 BasicCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:59,405 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 50 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 00:46:59,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-11 00:46:59,412 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 00:46:59,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:59,425 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 00:46:59,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-02-11 00:46:59,623 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (6826states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. [2022-02-11 00:46:59,624 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-11 00:46:59,624 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-11 00:46:59,624 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-11 00:46:59,627 INFO L733 BasicCegarLoop]: Path program histogram: [392, 6, 4, 3, 3, 1, 1, 1] [2022-02-11 00:46:59,630 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 00:46:59,630 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 00:46:59,631 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 12:46:59 BasicIcfg [2022-02-11 00:46:59,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 00:46:59,632 INFO L158 Benchmark]: Toolchain (without parser) took 914449.76ms. Allocated memory was 255.9MB in the beginning and 1.2GB in the end (delta: 918.6MB). Free memory was 214.2MB in the beginning and 726.4MB in the end (delta: -512.2MB). Peak memory consumption was 407.0MB. Max. memory is 8.0GB. [2022-02-11 00:46:59,632 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 255.9MB. Free memory was 215.6MB in the beginning and 215.6MB in the end (delta: 49.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:46:59,632 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.05ms. Allocated memory is still 255.9MB. Free memory was 214.1MB in the beginning and 212.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 00:46:59,632 INFO L158 Benchmark]: Boogie Preprocessor took 14.51ms. Allocated memory is still 255.9MB. Free memory was 212.5MB in the beginning and 211.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 00:46:59,632 INFO L158 Benchmark]: RCFGBuilder took 407.78ms. Allocated memory is still 255.9MB. Free memory was 211.3MB in the beginning and 224.8MB in the end (delta: -13.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2022-02-11 00:46:59,632 INFO L158 Benchmark]: TraceAbstraction took 913994.02ms. Allocated memory was 255.9MB in the beginning and 1.2GB in the end (delta: 918.6MB). Free memory was 224.3MB in the beginning and 726.4MB in the end (delta: -502.1MB). Peak memory consumption was 416.4MB. Max. memory is 8.0GB. [2022-02-11 00:46:59,632 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 255.9MB. Free memory was 215.6MB in the beginning and 215.6MB in the end (delta: 49.6kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.05ms. Allocated memory is still 255.9MB. Free memory was 214.1MB in the beginning and 212.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.51ms. Allocated memory is still 255.9MB. Free memory was 212.5MB in the beginning and 211.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 407.78ms. Allocated memory is still 255.9MB. Free memory was 211.3MB in the beginning and 224.8MB in the end (delta: -13.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 913994.02ms. Allocated memory was 255.9MB in the beginning and 1.2GB in the end (delta: 918.6MB). Free memory was 224.3MB in the beginning and 726.4MB in the end (delta: -502.1MB). Peak memory consumption was 416.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (6826states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. - TimeoutResultAtElement [Line: 133]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6826states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6826states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. - TimeoutResultAtElement [Line: 137]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6826states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 913.9s, OverallIterations: 411, TraceHistogramMax: 3, PathProgramHistogramMax: 392, EmptinessCheckTime: 1.1s, AutomataDifference: 355.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73290 SdHoareTripleChecker+Valid, 142.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 73290 mSDsluCounter, 156731 SdHoareTripleChecker+Invalid, 119.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 41780 IncrementalHoareTripleChecker+Unchecked, 337646 mSDsCounter, 17466 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 465837 IncrementalHoareTripleChecker+Invalid, 525083 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17466 mSolverCounterUnsat, 12677 mSDtfsCounter, 465837 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31847 GetRequests, 14962 SyntacticMatches, 597 SemanticMatches, 16287 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 259227 ImplicationChecksByTransitivity, 269.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6938occurred in iteration=401, InterpolantAutomatonStates: 11742, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.0s AutomataMinimizationTime, 410 MinimizatonAttempts, 242100 StatesRemovedByMinimization, 405 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.1s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 365.2s InterpolantComputationTime, 17909 NumberOfCodeBlocks, 17891 NumberOfCodeBlocksAsserted, 1277 NumberOfCheckSat, 25530 ConstructedInterpolants, 808 QuantifiedInterpolants, 222363 SizeOfPredicates, 4803 NumberOfNonLiveVariables, 41494 ConjunctsInSsa, 7978 ConjunctsInUnsatCore, 1197 InterpolantComputations, 18 PerfectInterpolantSequences, 2430/9498 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown